#include <stdio.h>

void func (int n, int prev_flag, long long tmp, long long w_all, long long *w, long long *fib, long long *ans) {
  if (n <= 0) {
    if (tmp > *ans) {
      *ans = tmp;
    }
    return;
  }
  
  if (tmp+fib[n+1]-2LL <= *ans) {
    return;
  }
  
  n--;
  if (w[n] <= w_all) {
    func(n, 1, tmp+fib[n], w_all-w[n], w, fib, ans);
    return;
  }
  
  if (prev_flag > 0 && n > 0 && w[n]+w[n-1] < w[n+1] && w[n-1] > w_all) {
    func(n, 1, tmp-fib[n+1]+fib[n], w_all+w[n+1]-w[n], w, fib, ans);
    return;
  }
  
  func(n, 0, tmp, w_all, w, fib, ans);
  if (prev_flag > 0 && w[n] <= w_all+w[n+1]) {
    func(n, 1, tmp-fib[n+1]+fib[n], w_all+w[n+1]-w[n], w, fib, ans);
  }
  
  return;
}

int main () {
  int t = 0;
  int n = 0;
  long long w_all = 0LL;
  long long w[75] = {};
  
  int res = 0;
  
  long long fib[77] = {};
  
  fib[0] = 1LL;
  fib[1] = 2LL;
  for (int i = 2; i < 77; i++) {
    fib[i] = fib[i-1]+fib[i-2];
  }
  
  res = scanf("%d", &t);
  while (t > 0) {
    long long ans = 0LL;
    res = scanf("%d", &n);
    res = scanf("%lld", &w_all);
    for (int i = 0; i < n; i++) {
      res = scanf("%lld", w+i);
    }
    func(n, 0, 0LL, w_all, w, fib, &ans);
    printf("%lld\n", ans);
    t--;
  }
  
  return 0;
}