Among the students in Yuna's class, there are 28 students who like Korean, 27 students who like math, and 22 students who like both Korean and math. If there is no student who does not like both Korean and math, how many students are there in Yuna's class?
28 27 [OP_ADD] 22 [OP_SUB]
var_a = 28
var_b = 27
var_c = var_a + var_b
var_d = 22
var_e = var_c - var_d
print(int(var_e))