def main():
    S = input()
    S = S.replace("yukicoder", "-")

    rle = [[S[0], 1]]

    for i in range(1, len(S)):
        if rle[-1][0] == S[i]:
            rle[-1][1] += 1
        else:
            rle.append([S[i], 1])

    ans = 0

    for (s, c) in rle:
        if s == "-":
            ans = max(ans, c)

    print(ans)


main()