Among 48 children, 38 children could do A and 29 children could do B. How many children can do both A and B if there is no child who can neither A nor B?
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))