#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char tmp[3]={'\0'};
    char* test="abcdefghijklmnopqrstuvwxyz";
    for(i=0;i<(int)strlen(test);i++)
    {
        tmp[1]=((test[i])%(0x60))%10+0x30;
        tmp[0]=(test[i]%0x60)/10+0x30;
        if (tmp[0]==0x30) {tmp[0]=tmp[1];tmp[1]=tmp[2];}
        printf("%s",tmp);
    }
    printf("\n");

    return 0;
}