你的代码仅仅处理了一个测试用例，没有循环处理多个测试用例

def solution(inp_str):
    d = {}.fromkeys(('A', 'B', 'C', 'D', 'E', 'F', 'G',
                    'H', 'I', 'H'), 0)
    for line in inp_str:
        for i, ch in enumerate(line[::-1]):
            d[ch] += 10**i
    sorted_d = sorted(d.items(), key=lambda x: x[1], reverse=True)  # 按照value排序
    ret = 0
    i = 9
    for e in sorted_d:
        ret += e[1]*i
        i -= 1
    print ret

import sys

while True:
    try:
        line = sys.stdin.readline()
        if line=='':
            break
        n = int(line)
        inp_str = []
        for i in range(n):
            inp = sys.stdin.readline()
            inp_str.append(inp)
        solution(inp_str)
    except:
        break