include <bits/stdc++.h>

using namespace std;

define ll long long

define endl "\n"

int main(){
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n, x; cin >> n >> x;
int a[n];
for(int i=0; i<n; i++) cin >> a[i];
int i, j; i = 0;
j = n-1;
int check = 0;
while(i < j){
if(a[i] + a[j] == x){
cout << i+1 << " " << j+1;
check = 1;
break;
}
else if(a[i] + a[j] > x){
j--;
}
else if(a[i] + a[j] < x){
i++;
}
}
if(check == 0) cout << "No solution";
}