num = int(input())
salary = int(input())

Facebook = 150
Instagram = 100
Reddit = 50


for i in range(1, num + 1):

    if salary <= 0:
        print("You have lost your salary.")
        break

    sites = input()

    if sites == "Facebook":
        salary -= Facebook
    elif sites == "Instagram":
        salary -= Instagram
    elif sites == "Reddit":
        salary -= Reddit

if salary > 0:
    print(salary)