trembles
Evolution I has ended with 14 generations.
EVOLUTION II HAS STARTED
Pi
pie
Phi
not allowed - only one letter can be added/subracted in one turn
pied
tied
verb conjugations are not allowed
pier
no - way too many rules broken
piper
hyper
viper
vipers
wipers
snipers
Invalid
Reasons:
- a letter is replaced and added on the same turn
trembles