SOLUTION OF UVA 10055

//   Question of  10055 - Hashmat the Brave Warrior
//   Mahmud_Jamil





#include<stdio.h>
int main()
{
long long int a,b,c;
while(scanf("%lld%lld",&a,&b)==2)
{
if(a>b)
c=a-b;
else
c=b-a;
printf("%lld\n",c);
}
return 0;
}