Barney hang Nora think feeling Barney wants send cheesy text message want happy possible initially happiness level Nora 0 Nora love pickup line like I m fall stuff totally know n pickup line consist lowercase English letter equal write different pronouncing meaning every time Nora see ith pickup line consecutive subsequence Barneys text message happiness level increase ai these substring overlap example Nora pickup line aa twice pickup line ab text message aaabdue texte app limit Barneys text l charactersbarney ask help Nora happy possible go to legen