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

int main() {
    char str[101];
    
    fgets(str,sizeof(str),stdin);
    str[strcspn(str,"\n")]=0;
    for(int i =0;str[i] != '\0';i++){
        printf("invalid input\n");
        return 0;
    }
}
 int len =strlen(str);
 int count=0;
 int i= len-1;
while(i.=0&& str[i]=='')
i--;
while(i>=0&&str[i]!=''){
    count++;
    i--;
}
printf("%d\n",count);
return 0;

}