n = int(input())


def is_yiwiy9_num(x):
    x //= 10
    x = str(x)
    if len(x) < 9:
        return False
    for i in range(len(x) // 2):
        if x[i] != x[-(i + 1)]:
            return False
    return True


ans = str(n)
while len(ans) < 10:
    ans += ans

print(ans)
# print(int(ans) % n)