#include <stdio.h>

int puv[10];
int tmp[10];
int n, m, i, v, t;

int suc(){
int s = 0;
for (i=1; i < 9; ++i){
s+=tmp[i];
}
return s;
}

int main(){
scanf("%d", &n);
while (n!=0) {
for (i=1; i <10; ++i){
puv[i] = 0; tmp[i] = 0;
}
m = 11*n;
i = 1;
for (; n > 0; n/=10) {
puv[i] = n % 10;
++i;
}
i = 1;
for (; m > 0; m/=10) {
tmp[i] = m % 10;
++i;
}
m = 11;

v = 0;
for (i=1; i < 8; ++i){
v+=puv[i];
}

while (suc() != v) {
int p = 0;
for (i = 1; i < 9; ++i) {
t = tmp[i] + puv[i] + p;
tmp[i] = t % 10;
p = t / 10;
}
++m;
}

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

scanf("%d", &n);
}
return 0;
}