#include<stdio.h>
#include<string.h>
#include<stdlib.h>

//2020	字符串转化
int main() {

	char s[105];
	while (scanf("%s", &s) != EOF) {
		int len = strlen(s);
		int sum = 0;//所有数字之和
		for (int i = 0; i < len; i++) {
			sum = sum + (s[i] - 96);
		}
		printf("%d\n", sum);
	}
	return 0;
}