import collections

def read_data():
    Nstr = input()
    data = [int(n) for n in Nstr]
    return data

memo = collections.defaultdict(int)
ww = list()

def solve(data):
    global memo, ww
    init_ww(data)
    if len(data) == 13:
        return 100
    return solve_core(data, 0)

def init_ww(data):
    global ww
    n = len(data)
    for i, w0 in enumerate(data):
        row = []
        for j in range(i + 1, n):
            if data[j] == w0:
                row.append(j)
        ww.append(row)

def solve_core(data, idx):
    global memo, ww
    N = lst2int(data)
    if N in memo:
        return memo[N]
    n = len(data)
    record = 0
    for idx1 in range(idx, n - 2):
        c = data[idx1]
        if c == 0 or c == -1:
            continue
        data[idx1] = -1
        for idx2 in range(idx1 + 1, n - 1):
            w = data[idx2]
            if w == c or w == -1:
                continue
            data[idx2] = -1
            cww = c * 100 + w * 11
            for idx3 in ww[idx2]:
                if data[idx3] == -1:
                    continue
                data[idx3] = -1
                score = solve_core(data, idx1 + 1) + cww
                if record < score:
                    record = score
                data[idx3] = w
            data[idx2] = w
        data[idx1] = c
    memo[N] = record
    return record
                
def lst2int(data):
    val = 0
    for v in data:
        if v == -1:
            continue
        else:
            val *= 10
            val += v
    return val
                
data = read_data()
print(solve(data))