#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <math.h>



int main(void)
{
	int i;
	int s, d;
	int num[10] = { 0 };
	int sum = 1;

	scanf("%d", &s);

	while (s != 0) {
		d = s % 10;
		switch (d) {
		case 0: num[0]++;	break;
		case 1: num[1]++;	break;
		case 2: num[2]++;	break;
		case 3: num[3]++;	break;
		case 4: num[4]++;	break;
		case 5: num[5]++;	break;
		case 6: num[6]++;	break;
		case 7: num[7]++;	break;
		case 8: num[8]++;	break;
		case 9: num[9]++;	break;
		}
		s = s / 10;
	}


	for (i = 0; i < 10; i++) {
		sum += num[i] * 2;
	}
	sum += num[0];
	sum += num[4];
	sum += num[6];
	sum += num[9];
	sum += num[8] * 2;


	printf("%d\n", sum);


	return 0;
}