#include<bits/stdc++.h>
using namespace std;
int main() {
int t; cin>>t;
if(t>=1&&t<=50)
{
while(t--)
{
int n,k; cin>>n>>k;
if(n>=2&&n<=100000)
{
int a[n];
for(int i=0;i<n;i++)
{
cin>>a[i];
}
int found=0;
for(int i=0;i<n-1;i++)
{
for(int j=i+1;j<n;j++)
{
if(a[j]-a[i]==k)
{
found=1;
break;
}
}
}
if(found==1)
cout<<"true"<<"\n";
else
cout<<"false"<<"\n";
}
}
}
return 0;
}
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