// editor4/
#include<stdio.h>
int totalcost(int qx,int px,int qy,int py, int qz,int pz){
}
int main(){
    int qx,px,qy,py,qz,pz;
    scanf("%d %d", &qx, &px);
    scanf("%d %d", &qy, &py);
    scanf("%d %d", &qy, &py);
    if(qx<0||px<0||qy<0||py<0||qz<0||pz<0);
     printf("Invalid input");
     return 0;
}
    int total = totalcost(qx,px,qy,py,qz,pz);
    printf("%d", total);
    return 0;
}