// editor2
#include<iuostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    getline(cin,s);
    for(char c:s)
    if(!isalpha(c) && c!=' ')
    {
        cout<<"Invalid input";
        return 0;
    }
    vector<string> w;
    stringstream ss(s);
    string x;
    while(ss>>x) w.push_back(x);
    int mx=0;
    for(auto &i:w) mx=max(mx,(int)i.size());
    for(int i=0;i<mx;i++)
    {
        for(auto &j:w)
        cout<<(i<j.size()?j[i]:' ')<<" ";
        cout<<"\n";
    }
}