n=input()
a=[int(i) for i in n.replace('?','4').split()]
b=[int(i) for i in n.replace('?','1').split()]
cnt1=cnt2=0
if min(a)==a[1] or max(a)==a[1]:
    cnt1=1
if min(b)==b[1] or max(b)==b[1]:
    cnt2=1
if cnt1==1 and cnt2==1:
    print(14)
elif cnt1==1:
    print(4)
elif cnt2==1:
    print(1)