l1 = ["5","7","8"]

if "8" in l1:
    print("Yes.")

if "8" not in l1:
    print ("No.")    

st1 = "friday"

if "day" in st1:
    print ("Yes.")

if "day" not in st1:
    print ("No.")

print (len(l1))

if len(l1) > 4:
    print("That list is long.")
if len(l1) < 5:
    print("The list is short.")
