def func(strings_list):
    the_all_big = ('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J')
    D = {i: {j: 0 for j in the_all_big} for i in range(1, 12 + 1)}
    G = {i: 0 for i in the_all_big}
    # 结果；集合去重
    result, h = 0, set(i[0] for i in strings_list)
    # 计算个数
    for each_string in strings_list:
        for i, a in enumerate(reversed(each_string), 1):
            D[i][a] += 1
    # 计算权值
    for i in range(1, 12 + 1):
        for a, j in D[i].items():
            if i 0: G[a] += j * 10 ** (i - 1)
    sorted_result = sorted(G.iteritems(), key=lambda k: k[1])
    for i in range(0, 10):
        # 开头不能为0
        if i == 0:
            for j in range(0, 10):
                if sorted_result[j][0] not in h:
                    sorted_result.pop(j)
                    break
        else:
            result += i * sorted_result[i - 1][1]
    return result
if __name__ == '__main__':
    while True:
        try:
            strings_list = [raw_input() for i in range(int(raw_input()))]
            print func(strings_list)
        except:
            break