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#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
#pragma GCC optimize("unroll-loops")    
#include <bits/stdc++.h>
#define pb push_back
#define x first
#define y second
#define mp make_pair
#define len(a) int(a.size())
#define files(FILENAME) read(FILENAME); write(FILENAME)
#define read(FILENAME) freopen((string(FILENAME) + ".in").c_str(), "r", stdin)
#define write(FILENAME) freopen((string(FILENAME) + ".out").c_str(), "w", stdout)
using namespace std;
        
template<typename T1, typename T2>inline void chkmin(T1 &x, T2 y) { if (x > y) x = y; }
template<typename T1, typename T2>inline void chkmax(T1 &x, T2 y) { if (x < y) x = y; } 
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const pair<T, U> &_p) { _out << _p.first << ' ' << _p.second; return _out; }
template<typename T, typename U> inline istream &operator>> (istream &_in, pair<T, U> &_p) { _in >> _p.first >> _p.second; return _in; }
template<typename T> inline ostream &operator<< (ostream &_out, const vector<T> &_v) { if (_v.empty()) { return _out; } _out << _v.front(); for (auto _it = ++_v.begin(); _it != _v.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline istream &operator>> (istream &_in, vector<T> &_v) { for (auto &_i : _v) { _in >> _i; } return _in; }
template<typename T> inline ostream &operator<< (ostream &_out, const set<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const multiset<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const unordered_set<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T> inline ostream &operator<< (ostream &_out, const unordered_multiset<T> &_s) { if (_s.empty()) { return _out; } _out << *_s.begin(); for (auto _it = ++_s.begin(); _it != _s.end(); ++_it) { _out << ' ' << *_it; } return _out; }
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const map<T, U> &_m) { if (_m.empty()) { return _out; } _out << '(' << _m.begin()->first << ": " << _m.begin()->second << ')'; for (auto _it = ++_m.begin(); _it != _m.end(); ++_it) { _out << ", (" << _it->first << ": " << _it->second << ')'; } return _out; }
template<typename T, typename U> inline ostream &operator<< (ostream &_out, const unordered_map<T, U> &_m) { if (_m.empty()) { return _out; } _out << '(' << _m.begin()->first << ": " << _m.begin()->second << ')'; for (auto _it = ++_m.begin(); _it != _m.end(); ++_it) { _out << ", (" << _it->first << ": " << _it->second << ')'; } return _out; }
        
typedef long long base; 
typedef pair<int, int> point;      
typedef complex<double> comp;

const int N = 102;

int n, m;
int a[N][N];
int p[N * 2];
int vis;
int used[N];
vector<int> edge[N];

bool dfs(int i) {
	if (used[i] == vis) return false;
	used[i] = vis;
	for (auto j : edge[i]) {
		if (p[j] == -1 || dfs(p[j])) {
			p[i] = j;
			p[j] = i;
			return true;
		}
	}
	return false;
}

int main() {
    ios::sync_with_stdio(0);
    srand(time(0));
    cin >> n >> m;
    for (int i = 0; i < n; ++i) {
    	for (int j = 0; j < m; ++j) {
    		cin >> a[i][j];
    		--a[i][j];
    	}
    }
    for (int i = 0; i < m; ++i) {
    	for (int j = 0; j < n; ++j) edge[j].clear();
    	for (int j = 0; j < n; ++j) {
    		for (int q = i; q < m; ++q) {
    			edge[a[j][q] / m].pb(j + n);
    		}
    	}
    	for (int j = 0; j < n * 2; ++j) p[j] = -1;
    	bool chg = true;
    	while (chg) {
    		++vis;
    		chg = false;
    		for (int i = 0; i < n; ++i) {
    			if (p[i] == -1) {
    				chg |= dfs(i);
    			}
    		}
    	}
    	++vis;
    	for (int j = 0; j < n; ++j) {
    		for (int q = i; q < m; ++q) {
    			if (p[a[j][q] / m] == j + n) {
    				p[a[j][q] / m] = -1;
    				swap(a[j][i], a[j][q]);
    			}
    		}
    	}
    }
    for (int i = 0; i < n; ++i) {
    	for (int j = 0; j < m; ++j) {
    		cout << a[i][j] + 1 << ' ';
    	}
    	cout << '\n';
    }
    for (int i = 0; i < m; ++i) {
    	vector<int> who;
    	for (int j = 0; j < n; ++j) who.pb(a[j][i]);
   		sort(who.begin(), who.end());
   	    for (int j = 0; j < n; ++j) a[j][i] = who[j];
    }
 	for (int i = 0; i < n; ++i) {
    	for (int j = 0; j < m; ++j) {
    		cout << a[i][j] + 1 << ' ';
    	}
    	cout << '\n';
    }
}  

Measured memory_bytes: 512