#!/usr/bin/env python3

import random

def get_int(msg, min, default):
    while True:
        try:
            line = input(msg)

            if not line and default is not None:
                print("*default:",default)
                return default

            i = int(line)

            if i < min:
                print("*must be >=", min)
            else:
                return i
        except ValueError as err:
            print(err)

rows = get_int("rows: ", 1, 20)
columns = get_int("columns: ", 1, 10)
min = get_int("min: ", -1000, 0)

default = 1000
if min > default:
    default = min * 2

max = get_int("max: ", min, default)

row = 0
while row < rows:
    line = ""
    column = 0
    while column < columns:
        rand = random.randint(min,max)
        line += str(rand)
        cnt = 0
        while True:
            if 10 - len(str(rand)) - cnt > 0:
                line += " "
                cnt += 1
            else:
                break
        column += 1
    print(line)
    row += 1