#include <iostream>
using namespace std;

int main() {
    int n=4;
    
    int num=1;
    for(int i=0;i<n;i++){
        for(int j=i+1;j>0;j--){//backwards floyd'ss triangle
            cout<<num<<" ";
            num++;
        }
        cout<<endl;
    }
    
    return 0;
} 

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