Excuse me for the belated reply.
gerjoaguimar, you just have to modify it by increment:
alias go { var %r 1 while %r <= $len($$1) { echo -a $left($1,%r) inc %r } }
h he hel hell helloThe command is: /go OneWordHere
If you want to be able to enter more than one word, add a dash next to $1 as in $1-