Yuna is 8 years old this year. Her father is 20 years older than Yuna, and her grandfather is 25 years older than her father. How old is her grandfather this year?
8 20 [OP_ADD] 25 [OP_ADD]
var_a = 8
var_b = 20
var_c = var_a + var_b
var_d = 25
var_e = var_c + var_d
print(int(var_e))