#define sub(a,b) a%b
#include<stdio.h>
#include<string.h>

int main()
{
    int c,d,e,flag=1;
    char f;
    while (flag)
    {
        scanf("%d%d",&c,&d);
        e=sub(c,d);
        printf("%d\n",e);
        printf("go on or not,if go on please press y,if not press n\n");
        f=getchar();
        if (f=='y')
        {
            flag=1;
        }
        else if (f=='n')
        {
            flag=0;
            printf("The end\n");
            
        }
    }
    return(0);
}