number_of_tabs = int(input())
salary = float(input())

for n in range(number_of_tabs):
    current_tab = input()
    if current_tab == "Facebook":
        salary -= 150
    elif current_tab == "Instagram":
        salary -= 100
    elif current_tab == "Reddit":
        salary -= 50
    else:
        salary = salary
    if salary <= 0:
        print("You have lost your salary.")
if salary > 0:
    print(f"{salary:.0f}")