Change one Letter

hub = bus..........

Hub = Sub I know it's an abbreviation,lol

ok then, sub = bus

bus = but :tehe::tehe::tehe:

but = tub...

Tub = Rub..........

rub = rut.....

Rut = Nut.........

nut...=...nit

OK I'll say it.....Nit = Tit....:tehe:

tit.....tat

Tat = Tap.............

tap = pat...

pat..........sat

sat=sag................