#include <stdio.h>
#include <stdint.h>
uint8_t extract_field(uint16_t reg) {
// Your logic here
int mask = (1u << 5 ) - 1;
uint8_t result = (reg >> 4) & mask;
return result;
// Binary = 0000 0001 1111 0000 → bits 4–8 are all 1)
}
int main() {
uint16_t reg;
scanf("%hx", ®);
printf("%u", extract_field(reg));
return 0;
}