Problem: Asterix, Obelix and their temporary buddies Suffix and Prefix has finally found the Harmony temple. However, its doors were firmly locked and even Obelix had no luck opening them.

A little later they found a string s, carved on a rock below the temple's gates. Asterix supposed that that's the password that opens the temple and read the string aloud. However, nothing happened. Then Asterix supposed that a password is some substring t of the string s.

Prefix supposed that the substring t is the beginning of the string s; Suffix supposed that the substring t should be the end of the string s; and Obelix supposed that t should be located somewhere inside the string s, that is, t is neither its beginning, nor its end.

Asterix chose the substring t so as to please all his companions. Besides, from all acceptable variants Asterix chose the longest one (as Asterix loves long strings). When Asterix read the substring t aloud, the temple doors opened. 

You know the string s. Find the substring t or determine that such substring does not exist and all that's been written above is just a nice legend.

Input

You are given the string s whose length can vary from 1 to 106 (inclusive), consisting of small Latin letters.

Output

Print the string t. If a suitable t string does not exist, then print "Just a legend" without the quotes.

Examples

Input

fixprefixsuffix


Output

fix

Input

abcdabc


Output

Just a legend

Solution (in PYTHON):

Solution:
s = raw_input()
F = [0]*(len(s) + 1)

for i in range(2, len(s) + 1):
    j = F[i-1]
    while True:
        if s[j] == s[i-1]:
            F[i] = j + 1
            break
        if j == 0:
            F[i] = 0
            break
        j = F[j]

ans = None
if F[-1] > 0:
    for i in range(len(F) - 1):
        if F[i] == F[-1]:
            ans = F[-1]
            break

if ans is None:
    if F[F[-1]] > 0:
        ans = F[F[-1]]

if ans is None:
    print "Just a legend"
else:
    print s[:ans]