include <iostream>

using namespace std;
int main(){
int n,m;
cin>>n>>m;
int a[n];
for (int i=0;i<n;i++){ cin>>a[i];
}
int l=0;r=n-1;
while (l<r){
if (a[l]+a[r]==m){
cout<<l<<" "<<r; return 0; } else if (a[l]+a[r]>m){
r--;
}
else {l++;}
}
cout<<"No solution";
return 0;
}