l = input().split()
for i in range(len(l)):
    l[i] = int(l[i])
counter = 0

if(l[0]<=23 and l[1]>=23):
    pass
else:
    counter += 1

if(l[0]<=24 and l[1]>=24):
    pass
else:
    counter += 1

if(l[0]<=25 and l[1]>=25):
    pass
else:
    counter += 1

print(counter)