https://web2.0calc.com/questions/number-theory_59
1,2 and 9
Here's what I get :
11111 21112 91119
11211 21212 91219
11911 21912 91919
12121 22122 92129
12221 22222 92229
12921 22922 92929
19191 29192 99199
19291 29292 99299
19991 29992 99999
I already did, I think. Check it out!