Wrong manipulation of a string variable with cleanchars

[Imed Limam]

Dear Statalisters,

I am trying to convert an age variable into a variable for age groups as follows 1-5 ; 6-10 ; 11-15 ; ... I am using Stata 13.1 and using the user-written code cleanchars after the command egen cut as follows:
#

* Creating dummies for age groups
clear
set obs 500
set more off
gen age=int(100*runiform())+1
sum age
local mn = r(min)
local mx = r(max)
forvalues bot=`mn'(5)`mx' {
local top = `bot'+4
gen age`bot'to`top' = age >= `bot' & age <= `top'
}

* converting age variable into age groups
egen agegroup = cut(age), at(1 (5) 101) label

forvalues i = 1(5)96 {
local j = `i'+ 4
cleanchars , in("`i'-") out("`i'-`j'") vlab vval values
}

#

I obtained the following output:

#

agegroup:
0 1-5
1 6-10
2 11-155
3 16-2010
4 21-255
5 26-3010
6 31-355
7 36-4010
8 41-455
9 46-5010
10 51-555
11 56-6010
12 61-655
13 66-7010
14 71-755
15 76-8010
16 81-855
17 86-9010
18 91-955
19 96-10
20 101-5
name or _all required

#

I am probably missing something very basic I could not figure out. Any help will be highly appreciated.

Thanks.