8 people lined up. How many people are there between the person standing 4th from the back and the person standing 1st from the front?
8 1 [OP_SUB] 4 [OP_SUB]
var_a = 8
var_b = 1
var_c = var_a - var_b
var_d = 4
var_e = var_c - var_d
print(int(var_e))