A = [67, 69, 48, 78, 86]
print(A)
R = []
M = [[0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]]
# a<=d b>=c
for i in range(len(A)):
    a = A[i] // 10
    b = A[i] % 10

    for j in range(len(A)):
        c = A[j] // 10
        d = A[j] % 10
        if a <= d and b >= c:
            R.append([A[i], A[j]])


print("R=", R)