tabs=int(input())
salary=int(input())
penalty=0
for i in range(tabs):
    name_site=input()
    if name_site=="Facebook":
        penalty+=150
    if name_site=="Instagram":
        penalty+=100
    if name_site=="Reddit":
        penalty+=50
    if penalty>=salary:
        print("You have lost your salary.")
        break
if salary>penalty:
    print(salary - penalty)