I must be not suitable for learning this language

Test failed with s = "VLntuZwiiuRPgUb99999999999999999999999999999999999999999999999999999999999999999999999999999"
Expected "VLntuZwiiuRPgUb100000000000000000000000000000000000000000000000000000000000000000000000000000"
But got "VLntuZwiiuRPgUb99999999999999999999999999999999999999999999999999999999999999999999999999999" at src/lib.rs:59:9

I hate this one