There are some sheets of paper, yellow on the front and green on the back on the floor. Students flipped 16 papers that look yellow so that they look green. If there are 64 more green papers than yellow papers, what was the difference before flipping?
64 16 [OP_SUB] 16 [OP_SUB]
var_a = 64
var_b = 16
var_c = var_a - var_b
var_d = 16
var_e = var_c - var_d
print(int(var_e))