w = input()#輸入
if w == "Sunday":#星期7, 1, 2, 3, 4, 5, 6+輸出
print(0)
elif w == "Monday":
print(1)
elif w == "Tuesday":
print(2)
elif w == "Wednesday":
print(3)
elif w == "Thursday":
print(4)
elif w == "Friday":
print(5)
elif w == "Saturday":
print(6)
else:
print("error")#都不是