'Hello' is the normal one when they just dont care about you
'Hellooo' is the one when they are nervous and has a crush on you
'HellOooOoo' means he is a
maniac
'HellOOoo' means he wants to be in a
relationship with you and wants to make babys with you
'helo' means he is going to
murder you
'Hell' means he is satan. RUN