Menampilkan angka dengan pola tertentu pada matriks

print ('Ini adalah program matriks (n x n)')
A = [(1,4), (2,3)]
B = [(1,6,7), (2,5,8), (3,4,9)]
D = [(1,8,9,16), (2,7,10,15), (3,6,11,14), (4,5,12,13)]
x = int(input('Berapa baris yang Anda inginkan?'))
y = int(input('Berapa kolom yang Anda inginkan?'))

if x == 1 and y == 1:
    print (1)


elif x == 1 and y == 2:
    for (a,b) in A:
        if a == 2:
            break
        print (a,b-2)

elif x == 1 and y == 3:
    for (a,b,c) in B:
        if a == 2:
            break
        print (a,b-4,c-4)

elif x == 1 and y == 4:
    for (a,b,c,d) in D:
        if a == 2:
            break
        print (a,b-6,c-6,d-12)

elif x == 2 and y == 1:
    for (a,b) in A:
        print (a)

elif x == 2 and y == 2:
    for (a,b) in A:
        print (a,b)

elif x == 2 and y == 3:
    for (a,b,c) in B:
        if a == 3:
            break
        print (a,b-2,c-2)

elif x == 2 and y == 4:
    for (a,b,c,d) in D:
        if a == 3:
            break
        print (a,b-4,c-4,d-8)


elif x == 3 and y == 1:
    for (a,b,c) in B:
        print (a)

elif x == 3 and y == 2:
    for (a,b,c) in B:
        print (a,b)

elif x == 3 and y == 3:
    for (a,b,c) in B:
        print (a,b,c)

elif x == 3 and y == 4:
    for (a,b,c,d) in D:
        if a == 4:
            break
        print (a,b-2,c-2,d-4)

elif x == 4 and y == 1:
    for (a,b,c,d) in D:
        print (a)

elif x == 4 and y == 2:
    for (a,b,c,d) in D:
        print (a,b)

elif x == 4 and y == 3:
    for (a,b,c,d) in D:
        print (a,b,c)

elif x == 4 and y == 4:
    for (a,b,c,d) in D:
        print (a,b,c,d)

else:
    print ('Tidak di ketahui')