#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin>>t;
while(t--)
{
int n,v;
long long int a[n];
cin>>n>>v;
for(int i=0;i<n;i++)
{
cin>>a[i];
}
int s=0;
for(int i=0;i<n;i++)
{
for(int j=1;j<n;j++)
{
if(a[i]-a[j]==v || a[j]-a[i]==v)
{
s++;
}
}
}
if(s>0)
cout<<"true\n";
else
cout<<"false\n";
}
return 0;
}
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