f91

#include<stdio.h>
int main()
{
    long long int n,a;
    while(scanf("%lld",&n)!=EOF)
    {
        if(n==0)
        break;
        if(n<=100)
        {
            printf("f91(%lld) = 91\n",n);
        }
        else if(n>=101)
        {
            a=n-10;
            printf("f91(%lld) = %lld\n",n,a);
        }
    }
    return 0;
}