def set_indexer(i, arr_list):
    index_dict = {}

    for arr in arr_list:
        if arr[i] in index_dict.keys():
            index_dict[arr[i]].append(arr)

        else:
            index_dict[arr[i]] = [arr]

    return index_dict


def sort_and_return(indexed_dict):
    sorted_list = sorted(indexed_dict.keys())
    sorted_arr = []
    for key in sorted_list:
        sorted_arr.extend(indexed_dict[key])

    return sorted_arr



if __name__ == '__main__':
    nm = input().split()

    n = int(nm[0])

    m = int(nm[1])

    arr = []

    for _ in range(n):
        arr.append(list(map(int, input().rstrip().split())))

    k = int(input())
    
    f_arr = sort_and_return(set_indexer(k, arr))
    
    for arr in f_arr:
        for _ in arr:
            print(_, end=' ')
        print()

sorted_athletes = sorted(arr, key= lambda x: x[k])
    [print(*athlete) for athlete in sorted_athletes]

sorted_lst = sorted(arr, key=lambda x: x[k])
    [print(*i)  for i in (sorted_lst)]

    sorted_arr = [arr[i][k] for i in range(n)]
    
    sorted_arr.sort()
    
    for x in sorted_arr:
        j = 0
        while arr[j][k] != x:
            j += 1
        print(*arr[j])
        arr.pop(j)