Seokjin is 15th in line at the mart, and Namjoon is 6 people ahead of Seokjin. What number is Namjoon on?
15 6 [OP_SUB] 1 [OP_SUB]
var_a = 15
var_b = 6
var_c = var_a - var_b
var_d = 1
var_e = var_c - var_d
print(int(var_e))