Eunji read 18 pages of the thesis on Wednesday, and also read it on Thursday. She read 23 pages of this thesis on Friday, resulting in 60 pages being read for 3 days. How many pages did Eunji read on Thursday?
60 18 [OP_SUB] 23 [OP_SUB]
var_a = 60
var_b = 18
var_c = var_a - var_b
var_d = 23
var_e = var_c - var_d
print(int(var_e))