#include<stdio.h>
#include<string.h>
int main()
{
    char a[1000002]; 
    int length;
    scanf("%s", a);
    length = strlen(a);
    a[length-1] += 2;
    for(int i = length-1; i > 0; i--) {
        if(a[i] > '9') {
            a[i] -= 10;        
            a[i-1] += 1;       
        }
    }
    if(a[0] > '9') {
        a[0] -= 10;
        printf("1");
    }
    printf("%s", a);
    return 0;
}//👀️