babul abbul bbaul bbaul abbul babul baubl abubl buabl ubabl aubbl uabbl bbual bbual bubal ubbal bubal ubbal abubl baubl aubbl uabbl buabl ubabl bablu abblu bbalu bbalu abblu bablu balbu ablbu blabu lbabu albbu labbu bblau bblau blbau lbbau blbau lbbau ablbu balbu albbu labbu blabu lbabu baulb abulb bualb ubalb aublb uablb balub ablub blaub lbaub albub labub bulab ublab bluab lbuab ulbab lubab aulbb ualbb alubb laubb ulabb luabb bbula bbula bubla ubbla bubla ubbla bblua bblua blbua lbbua blbua lbbua bulba ublba bluba lbuba ulbba lubba bulba ublba bluba lbuba ulbba lubba abulb baulb aublb uablb bualb ubalb ablub balub albub labub blaub lbaub aulbb ualbb alubb laubb ulabb luabb bulab ublab bluab lbuab ulbab lubab
Note: these 'words' (valid or invalid) are all the permutations of the word babul. These words are obtained by scrambling the letters in babul.