cf 1445B

#include<stdio.h>

int main()
{
    int t;
    scanf("%d", &t);

    while(t--)
    {
        int a, b, c, d;
        scanf("%d %d %d %d", &a, &b, &c, &d);

        if(a + b > c + d) printf("%d\n", a+b);
        else printf("%d\n", c+d);
    }
}