#include <stdio.h>
int main() {
int A, B;
scanf("%d", &A);
scanf("%d", &B);
for(int i=0; A>2 ;i++){
A=A-3;
}
for(int i=0; B>2; i++){
B=B-3;
}
if(B==A){
if(B==0){
B=1;
}
else if(B==1){
B=2;
}
else{
B=0;
}
}
if(B==1 && A==2 || B==2 && A==1){
printf("0");
}
else if((B==0 && A==2) || (B==2 && A==0)){
printf("1");
}
else{
printf("2");
}
return 0;
}
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