#include <stdio.h>

 #include <stdlib.h>

 int main(void)

 {

     int N,C,I;

     int *p;

     int i,j,k;

     freopen("in.in", "r", stdin);

     freopen("out", "w", stdout);

     scanf("%d",&N);

     for(i=;i<=N;i++)

     {

         scanf("%d",&C);

         scanf("%d",&I);

         p=(int *)malloc(sizeof(int)*I);

         for(j=;j<I;j++)

         {

             scanf("%d",p+j);

             for(k=;k<j;k++)

                 if(p[k]+p[j]==C)

                     goto out;

         }

 out:    printf("Case #%d: %d %d\n",i,k+,j+);

         while (getchar()!='\n')

             ;

         free(p);

     }

 }