mayday amyday myaday ymaday aymday yamday madyay amdyay mdayay dmayay admyay damyay mydaay ymdaay mdyaay dmyaay ydmaay dymaay aydmay yadmay adymay daymay ydamay dyamay mayady amyady myaady ymaady aymady yamady maaydy amaydy maaydy amaydy aamydy aamydy myaady ymaady mayady amyady yamady aymady ayamdy yaamdy aaymdy aaymdy yaamdy ayamdy madayy amdayy mdaayy dmaayy admayy damayy maadyy amadyy maadyy amadyy aamdyy aamdyy mdaayy dmaayy madayy amdayy damayy admayy adamyy daamyy aadmyy aadmyy daamyy adamyy mydaay ymdaay mdyaay dmyaay ydmaay dymaay myaday ymaday mayday amyday yamday aymday mdayay dmayay madyay amdyay damyay admyay ydamay dyamay yadmay aydmay daymay adymay aydamy yadamy adyamy dayamy ydaamy dyaamy ayadmy yaadmy aaydmy aaydmy yaadmy ayadmy adaymy daaymy aadymy aadymy daaymy adaymy ydaamy dyaamy yadamy aydamy dayamy adyamy maydya amydya myadya ymadya aymdya yamdya madyya amdyya mdayya dmayya admyya damyya mydaya ymdaya mdyaya dmyaya ydmaya dymaya aydmya yadmya adymya daymya ydamya dyamya mayyda amyyda myayda ymayda aymyda yamyda mayyda amyyda myayda ymayda aymyda yamyda myyada ymyada myyada ymyada yymada yymada ayymda yaymda ayymda yaymda yyamda yyamda madyya amdyya mdayya dmayya admyya damyya maydya amydya myadya ymadya aymdya yamdya mdyaya dmyaya mydaya ymdaya dymaya ydmaya adymya daymya aydmya yadmya dyamya ydamya mydyaa ymdyaa mdyyaa dmyyaa ydmyaa dymyaa myydaa ymydaa myydaa ymydaa yymdaa yymdaa mdyyaa dmyyaa mydyaa ymdyaa dymyaa ydmyaa ydymaa dyymaa yydmaa yydmaa dyymaa ydymaa aydyma yadyma adyyma dayyma ydayma dyayma ayydma yaydma ayydma yaydma yyadma yyadma adyyma dayyma aydyma yadyma dyayma ydayma ydyama dyyama yydama yydama dyyama ydyama mayayd amyayd myaayd ymaayd aymayd yamayd maayyd amayyd maayyd amayyd aamyyd aamyyd myaayd ymaayd mayayd amyayd yamayd aymayd ayamyd yaamyd aaymyd aaymyd yaamyd ayamyd mayyad amyyad myayad ymayad aymyad yamyad mayyad amyyad myayad ymayad aymyad yamyad myyaad ymyaad myyaad ymyaad yymaad yymaad ayymad yaymad ayymad yaymad yyamad yyamad maayyd amayyd maayyd amayyd aamyyd aamyyd mayayd amyayd myaayd ymaayd aymayd yamayd mayayd amyayd myaayd ymaayd aymayd yamayd aaymyd aaymyd ayamyd yaamyd ayamyd yaamyd myayad ymayad mayyad amyyad yamyad aymyad myyaad ymyaad myyaad ymyaad yymaad yymaad mayyad amyyad myayad ymayad aymyad yamyad yaymad ayymad yyamad yyamad ayymad yaymad ayaymd yaaymd aayymd aayymd yaaymd ayaymd ayyamd yayamd ayyamd yayamd yyaamd yyaamd aayymd aayymd ayaymd yaaymd ayaymd yaaymd yayamd ayyamd yyaamd yyaamd ayyamd yayamd madayy amdayy mdaayy dmaayy admayy damayy maadyy amadyy maadyy amadyy aamdyy aamdyy mdaayy dmaayy madayy amdayy damayy admayy adamyy daamyy aadmyy aadmyy daamyy adamyy madyay amdyay mdayay dmayay admyay damyay mayday amyday myaday ymaday aymday yamday mdyaay dmyaay mydaay ymdaay dymaay ydmaay adymay daymay aydmay yadmay dyamay ydamay maaydy amaydy maaydy amaydy aamydy aamydy mayady amyady myaady ymaady aymady yamady mayady amyady myaady ymaady aymady yamady aaymdy aaymdy ayamdy yaamdy ayamdy yaamdy mdayay dmayay madyay amdyay damyay admyay mdyaay dmyaay mydaay ymdaay dymaay ydmaay mayday amyday myaday ymaday aymday yamday daymay adymay dyamay ydamay aydmay yadmay adaymy daaymy aadymy aadymy daaymy adaymy adyamy dayamy aydamy yadamy dyaamy ydaamy aaydmy aaydmy ayadmy yaadmy ayadmy yaadmy dayamy adyamy dyaamy ydaamy aydamy yadamy mydaya ymdaya mdyaya dmyaya ydmaya dymaya myadya ymadya maydya amydya yamdya aymdya mdayya dmayya madyya amdyya damyya admyya ydamya dyamya yadmya aydmya daymya adymya mydyaa ymdyaa mdyyaa dmyyaa ydmyaa dymyaa myydaa ymydaa myydaa ymydaa yymdaa yymdaa mdyyaa dmyyaa mydyaa ymdyaa dymyaa ydmyaa ydymaa dyymaa yydmaa yydmaa dyymaa ydymaa myayda ymayda mayyda amyyda yamyda aymyda myyada ymyada myyada ymyada yymada yymada mayyda amyyda myayda ymayda aymyda yamyda yaymda ayymda yyamda yyamda ayymda yaymda mdayya dmayya madyya amdyya damyya admyya mdyaya dmyaya mydaya ymdaya dymaya ydmaya maydya amydya myadya ymadya aymdya yamdya daymya adymya dyamya ydamya aydmya yadmya ydayma dyayma yadyma aydyma dayyma adyyma ydyama dyyama yydama yydama dyyama ydyama yaydma ayydma yyadma yyadma ayydma yaydma dayyma adyyma dyayma ydayma aydyma yadyma aydaym yadaym adyaym dayaym ydaaym dyaaym ayadym yaadym aaydym aaydym yaadym ayadym adayym daayym aadyym aadyym daayym adayym ydaaym dyaaym yadaym aydaym dayaym adyaym aydyam yadyam adyyam dayyam ydayam dyayam ayydam yaydam ayydam yaydam yyadam yyadam adyyam dayyam aydyam yadyam dyayam ydayam ydyaam dyyaam yydaam yydaam dyyaam ydyaam ayaydm yaaydm aayydm aayydm yaaydm ayaydm ayyadm yayadm ayyadm yayadm yyaadm yyaadm aayydm aayydm ayaydm yaaydm ayaydm yaaydm yayadm ayyadm yyaadm yyaadm ayyadm yayadm adayym daayym aadyym aadyym daayym adayym adyaym dayaym aydaym yadaym dyaaym ydaaym aaydym aaydym ayadym yaadym ayadym yaadym dayaym adyaym dyaaym ydaaym aydaym yadaym ydayam dyayam yadyam aydyam dayyam adyyam ydyaam dyyaam yydaam yydaam dyyaam ydyaam yaydam ayydam yyadam yyadam ayydam yaydam dayyam adyyam dyayam ydayam aydyam yadyam
Note: these 'words' (valid or invalid) are all the permutations of the word mayday. These words are obtained by scrambling the letters in mayday.