#!/usr/bin/env pypy3
n,a,b,c = map(int, input().split())
s = [['0' for _ in range(n)] for _ in range(n)]
x, y = -1, -1
for i in range(n):
    for j in range(n):
        if b > 0:
            s[i][j] = '2'
            x = i
            y = j
            b -= 1

if x != n-1 and y != n-1:
    if a >= 2:
        s[x][y+1] = '1'
        s[x+1][y] = '1'
        a -= 2
    else: # c >= 2
        s[x][y+1] = '3'
        s[x+1][y] = '3'
        c -= 2

for i in range(n):
    for j in range(n):
        if s[i][j] == '0':
            if a > 0:
                s[i][j] = '1'
                a -= 1
            else:
                s[i][j] = '3'
                c -= 1

for i in range(n):
    print("".join(s[i]))