#include <stdio.h>
int main(void) {
int d1,d2,d3,d4,d5,d6,d7,d8,d9, cpf;
scanf("%d", &cpf);
d9=cpf%10;
d8=(cpf/10)%10;
d7=(cpf/100)%10;
d6=(cpf/1000)%10;
d5=(cpf/10000)%10;
d4=(cpf/100000)%10;
d3=(cpf/1000000)%10;
d2=(cpf/10000000)%10;
d1=(cpf/100000000)%10;
scanf("%d,%d,%d,%d,%d,%d,%d,%d,%d", &d1,&d2,&d3,&d4,&d5,&d6,&d7,&d8,&d9);
int dv, result;
result=((10*d1)+(9*d2)+(8*d3)+(7*d4)+(6*d5)+(5*d6)+(4*d7)+(3*d8)+(2*d9))%11;
int final;
int final1;
int j;
if(result<2)
{
result=0;
}
else
{
j=11-result;
}
if(result<2)
{
final=11-((11*d1)+(10*d2)+(9*d3)+(8*d4)+(7*d5)+(6*d6)+(5*d7)+(4*d8)+(3*d9))%11;
}
else
{
final=((11*d1)+(10*d2)+(9*d3)+(8*d4)+(7*d5)+(6*d6)+(5*d7)+(4*d8)+(3*d9)+(2*j))%11;
final1=11-final;
}
if(final<2)
{
final1=0;
}
if(result<2)
{
printf("%d%d", result,final1);
}
else
{
printf("%d%d", j, final1);
}
return 0;
}
