Students lined up in order of seniority. Yuna is younger than Yujeong who is 15th oldest and older than Eunji who is 17th oldest. In what number oldest is Yuna?
15 17 [OP_ADD] 2 [OP_FDIV]
var_a = 15
var_b = 17
var_c = var_a + var_b
var_d = 2
var_e = var_c // var_d
print(int(var_e))