a = 10
print(a)
print(10)
print("a")
b = 10 + 5
print(b)
c = a + b
print(c)
d = a + b + 20
print(d)
s = b - a
print(s)
s2 = a - b
print(s2)
m = a * b
print(m)
m2 = b * a
print(m2)
D = 10 / 2
print(D)
h = 10 / 3
print(h)