Write a program which reads an integer and prints sum of its digits.



Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Example

Input

123
55
1000
0


Output

6
10
1
#include<cstdio>
int main(void){char x[1001];int c,i;scanf("%s",x);while(x[0]-'0'){for(i=0,c=0;x[i]!=0;++i){c+=x[i]-'0';}printf("%d\n",c);scanf("%s",x);}return(0);}
