Matrix

a = int(input())
b = int(input())
c = int(input())
d = int(input())

for first_row_first_number in range(a, b+1):
    for first_row_second_number in range(a, b+1):
        for second_row_first_number in range(c, d+1):
            for second_row_second_number in range(c, d+1):
                sum_main_diagonal = first_row_first_number + second_row_second_number
                sum_second_diagonal = first_row_second_number + second_row_first_number
                if sum_main_diagonal == sum_second_diagonal:
                    if first_row_first_number != first_row_second_number and second_row_first_number != second_row_second_number:
                        print(f"{first_row_first_number}{first_row_second_number}")
                        print(f"{second_row_first_number}{second_row_second_number}")
                        print()