#include <iostream>
#include <vector>
#include <string>
 
using namespace std;
 
int main() {
    int N, M;
    cin >> N >> M; // Taking input for N and M
 
    vector<string> input(N);
    // Taking input for N strings
    for (int i = 0; i < N; ++i) {
        cin >> input[i];
    }
 
    // Generate combinations in order
    for (int i = 0; i < M; ++i) { // For each position (K)
        for (int j = 0; j < N; ++j) { // For each input string
            cout << input[j][i]; // Output the character at position 'i' from input string 'j'
        }
        cout << " ";
    }
 
    return 0;
}
 

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

MiAzCmFiYyAKZGVm

2 3
abc 
def