#include <stdio.h>
int main () {
int a, b, numa, numb, res;
char op;
scanf("%c %c %c", &a
, &op
, &b
); // printf("%c %c %c\n", a, op, b);
if(a >= 97) numa = a - 96;
else numa = a - 38;
if(b >= 97) numb = b - 96;
else numb = b - 38;
if(op == '+') res = numa + numb;
else if (op == '-') res = numa - numb;
else if (op == '*') res = numa * numb;
else if (op == '/') res = numa / numb;
else if (op == '%') res = numa % numb;
if(res >= 53) res = res - (res / 52) * 52;
if(res <= 0) res+=52;
if(res
<= 26) printf("%c", res
+96); //printf("%c %c %d %d %d %d %d", res+96, res+38, res, numa, numb, a, b);
return 0;
}
//6 * 27 = 162
//f * A
//buat fungsi rekursi nanti buat cek corner case
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