There is no child who cannot do either of A and B. If there are 38 children who can do A and 29 children who can do B and the total number of children is 48, how many children can do both?
38 29 [OP_ADD] 48 [OP_SUB]
var_a = 38
var_b = 29
var_c = var_a + var_b
var_d = 48
var_e = var_c - var_d
print(int(var_e))