def f(a):
global n
if n == 0 and a == 0:
return True
if n == a%10:
return True
if n == a//10:
return True
H1,M1=list(map(int,input().split()))
H2,M2=list(map(int,input().split()))
n=int(input())
S=0
while H1 != H2 or M1 != M2:
if f(H1) or f(M1):
S+=1
if M1 + 1 == 60:
M1=0
H1+=1
else:
M1+=1
if f(H2) or f(M2):
S+=1
print(S)