a = [0] * 5
for i in range(5):
    a[i] = int(input())

Fib = [-1, 1, 1]
while Fib[-1] <= 10 ** 15:
    Fib.append(Fib[-1] + Fib[-2])

cnt = 0
if a[4] in Fib:
    pos = Fib.index(a[4])
    cnt += 1
    v = [a[4]]
    for i in range(3, -1, -1):
        v.append(a[i])
        #print(v, Fib[pos:pos + cnt + 1])
        if v == Fib[pos:pos + cnt + 1]:
            cnt += 1
        else:
            if i == 3 and a[4] == 1:
                pos += 1
                #print(v, Fib[pos:pos + cnt + 1])
                if v == Fib[pos:pos + cnt + 1]:
                    cnt += 1
                    continue
            break
print(cnt)