题解 | #数据分类处理#

while 1:
    try:

        I0 = input().split()
        I = I0[1:]
        I_num = int(I0[0])

        R0 = input().split()
        R = list(set(list(map(int, R0[1:]))))
        R = sorted(R)

        output_list = []

        counter = 0

        for i in range(len(R)):
            output_list.append(str(R[i]))
            output_list.append(' ')
            count_idx = output_list.index(' ')

            for j in range(len(I)):
                if str(R[i]) in I[j]:
                    counter += 1
                    output_list.append(str(j))
                    output_list.append(I[j])

            if counter != 0:
                output_list[count_idx] = str(counter)
                counter = 0
            elif counter == 0:
                output_list.pop()
                output_list.pop()

        output_list.insert(0, str(len(output_list)))
        print(' '.join(output_list))

    except:
        break