题解 | #数据分类处理#

while True:
    try:
        ls=input().split(' ')[1:]
        s=' '.join(ls)
        rs=input().split(' ')[1:]
        rs=list(map(int,set(rs)))
        rs.sort()
        rs=list(map(str,rs))
        li=[]
        outcount=0
        for i in rs:
            if i not in s:
                continue
            suli=[]
            suli.append(i)
            j,elecount=0,0
            for ss in ls:
                if i in ss:
                    suli.append(str(j))
                    suli.append(ss)
                    elecount+=1
                j+=1
            suli.insert(1,str(elecount))
            li.append(' '.join(suli))
            outcount+=(elecount+1)*2
        li.insert(0,str(outcount))
        print(' '.join(li))

    except:
        break