Letter on position 1 (p) changed: 8 words cups dups gups hups oups sups tups yups Letter on position 2 (u) changed: 4 words paps peps pips pops Letter on position 3 (p) changed: 9 words pubs puds pugs puls puns purs puss puts puys Letter on position 4 (s) changed: 2 words pupa pupu