Excel 2007 :: Call Sub Using Variable?

I'm trying to call another sub with a variable string. I'm using excel 2007. I get the error "Compile Error: Expected Sub, Function, or Property" on the "Call" code. The want the code to run multiple different subs based on user input. For example if they typed "this" it would run the t sub, then h sub, then I sub and finally the s sub.

Code example

Dim Uncvrtdtxt as string
Dim SubName as string
Dim i as integer
Uncvrtdtxt = "this"
For i =1 to Len(Uncvrtdtxt)
SubName = Mid(Uncvrtdtxt, i, 1) & "Route"

[code]....