for number in range(10, 100):
tens = number // 10
units = number % 10
product = tens * units
if 5 <= product <= 10:
print(number)
for i in range(1,10):
for j in range(1,10):
if 4 print(10*i+j) # print(i,l) # print(str(i)+str(j))
или
for i in range(1,10):
for j in range(i,10):
if 4 print(10*i+j)
if i-j:
print(10*j+i)