#include<stdio.h>
char *key[]={" "," ","ABC","DEF","GHI","JKL","MNO","PQRS","TUV","WXYZ"};
void combine(char *digits)
{
    if (digits[0]=='\0') return;
    int digit1=digits[0]-'0';
    char *letters1=key[digit1];
    if(digits[1]=='\0')
    {
        for(int i=0; letters1[i]!='\0';i++)
        {
            prints("%c",letters1[i]);
        }
        return;
    }
    int digit2 =digits[1]-'0';
    char *letters2= key[digit2];
    for(int i=0;letters1[i]!='\0';i++){
       for(int j=0;letters2[j]!='\0';j++)
       {
           printf("%c%c",letters1[i],letters2[j]);
           
       }
    }
}
int main()
{
    char digits[];
    fgets(digits,sizeof(digits),stdin);
    combine(digits);
    return 0;
}