#include <stdio.h>
#include <stdint.h>
uint8_t extract_field(uint16_t reg)
{
uint8_t extract;
extract=(reg>>4)&0x1f;
return extract;
// Your logic here
return 0;
}
int main() {
uint16_t reg;
scanf("%hx", ®);
printf("%u", extract_field(reg));
return 0;
}