A_Square_String.py

import sys,math,os
from collections import defaultdict, deque, Counter, OrderedDict, namedtuple
from bisect import bisect_right, bisect_left

def li(): return list(map(int, sys.stdin.readline().strip().split()))
def intp(): return int(sys.stdin.readline().strip())

def string():
    return sys.stdin.readline().strip()

def fast_io():
    sys.stdin = open(0)
    sys.stdout = open(1, "w")

def solve():
    # Start here
    s = input()
    cur = ""
    for i in range(len(s)):
        cur += s[i]
        if cur + cur == s:
            print("YES")
            return
    if cur + cur == s:
        print("YES")
        return
    print("NO")
    return

if __name__ == "__main__":
    fast_io()
    t = int(input())
    for _ in range(t):
        solve()