The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: you collect baseball cards . suppose you start out with 15 . maria takes half of one more than the number of baseball cards you have . since you ' re nice , you give peter 1 baseball card . since his father makes baseball cards , paul decides to triple your baseball cards . how many baseball cards do you have at the end ?

Output: 18


Input: Consider Input: Problem: if s and t are both odd prime numbers ands < t , then how many different positive integer factors does 2 sthave ?

Output: 8


Input: Consider Input: Problem: in a class of 45 students , 12 enrolled for both english and german . 22 enrolled for german . if the students of the class enrolled for at least one of the two subjects , then how many students enrolled for only english and not german ?


Output: 23