//#define NDEBUG
#include <cstddef>
#include <cstdint>
#include <iostream>
#include <vector>

namespace n91 {

using i8 = std::int_fast8_t;
using i32 = std::int_fast32_t;
using i64 = std::int_fast64_t;
using u8 = std::uint_fast8_t;
using u32 = std::uint_fast32_t;
using u64 = std::uint_fast64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;

constexpr usize operator"" _z(unsigned long long x) noexcept {
  return static_cast<usize>(x);
}

class rep {
  const usize f, l;

public:
  class itr {
    friend rep;
    usize i;
    constexpr itr(const usize x) noexcept : i(x) {}

  public:
    void operator++() noexcept { ++i; }
    constexpr usize operator*() const noexcept { return i; }
    constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
  };
  constexpr rep(const usize first, const usize last) noexcept
      : f(first), l(last) {}
  constexpr itr begin() const noexcept { return itr(f); }
  constexpr itr end() const noexcept { return itr(l); }
};
class revrep {
  const usize f, l;

public:
  class itr {
    friend revrep;
    usize i;
    constexpr itr(usize x) noexcept : i(x) {}

  public:
    void operator++() noexcept { --i; }
    constexpr usize operator*() const noexcept { return i; }
    constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
  };
  constexpr revrep(usize first, usize last) noexcept : f(--first), l(--last) {}
  constexpr itr begin() const noexcept { return itr(l); }
  constexpr itr end() const noexcept { return itr(f); }
};
template <class T> using vec_alias = std::vector<T>;
template <class T> auto md_vec(const usize n, const T &value) {
  return std::vector<T>(n, value);
}
template <class... Args> auto md_vec(const usize n, Args... args) {
  return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
}
template <class T> constexpr T difference(const T &a, const T &b) {
  return a < b ? b - a : a - b;
}
template <class T> T scan() {
  T ret;
  std::cin >> ret;
  return ret;
}

} // namespace n91

#include <algorithm>
#include <iostream>
#include <utility>

namespace n91 {

u64 rand() {
  u64 seed = 91;
  seed ^= seed << 7;
  return seed ^= seed >> 9;
}

void main_() {
  const usize n = scan<usize>();
  const usize m = scan<usize>();
  auto a = md_vec(n, m, usize());
  for (auto &v : a) {
    for (auto &e : v) {
      e = scan<usize>() - 1_z;
    }
    for (const auto i : rep(1_z, m)) {
      std::swap(v[i], v[rand() % (i + 1_z)]);
    }
  }

  {
    auto count = md_vec(n, n, 0_z);
    for (const auto i : rep(0_z, n)) {
      for (const auto e : a[i]) {
        ++count[i][e / m];
      }
    }

    for (const auto j : rep(0_z, m)) {
      std::vector<usize> kouho(n, 0_z);
      for (const auto i : rep(0_z, n)) {
        for (const auto k : rep(0_z, n)) {
          if (count[i][k] > 0_z) {
            ++kouho[k];
          }
        }
      }
      std::vector<bool> used(n, false);
      for (const auto l : rep(0_z, n)) {
        const usize num =
            std::min_element(kouho.begin(), kouho.end()) - kouho.begin();
        for (usize i = 0_z; i != n; ++i) {
          if (!used[i] && count[i][num] > 0_z) {
            used[i] = true;
            for (const auto k : rep(0_z, n)) {
              if (count[i][k] > 0_z) {
                --kouho[k];
              }
            }
            for (const auto k : rep(j, m)) {
              if (a[i][k] / m == num) {
                std::swap(a[i][k], a[i][j]);
              }
            }
            --count[i][num];
            break;
          }
        }
        kouho[num] = std::numeric_limits<usize>::max();
      }
    }

    // std::cout << "\n";
    for (const auto &v : a) {
      for (const auto e : v) {
        std::cout << e + 1_z << " ";
      }
      std::cout << "\n";
    }
  }

  {
    for (const auto j : rep(0_z, m)) {
      std::vector<usize> temp;
      temp.reserve(n);
      for (const auto i : rep(0_z, n)) {
        temp.push_back(a[i][j]);
      }
      std::sort(temp.begin(), temp.end());
      for (const auto i : rep(0_z, n)) {
        a[i][j] = temp[i];
      }
    }

    // std::cout << "\n";
    for (const auto &v : a) {
      for (const auto e : v) {
        std::cout << e + 1_z << " ";
      }
      std::cout << "\n";
    }
  }
}

} // namespace n91

int main() {
  n91::main_();
  return 0;
}
