CF——A. Ksenia and Pan Scales

Input

The first line has a non-empty sequence of characters describing the scales. In this sequence, an uppercase English letter indicates a weight, and the symbol "|" indicates the delimiter (the character occurs in the sequence exactly once). All weights that are recorded in the sequence before the delimiter are initially on the left pan of the scale. All weights that are recorded in the sequence after the delimiter are initially on the right pan of the scale.

The second line contains a non-empty sequence containing uppercase English letters. Each letter indicates a weight which is not used yet.

It is guaranteed that all the English letters in the input data are different. It is guaranteed that the input does not contain any extra characters.

Output

If you cannot put all the weights on the scales so that the scales were in equilibrium, print string "Impossible". Otherwise, print the description of the resulting scales, copy the format of the input.

If there are multiple answers, print any of them.

Sample test(s)

input

AC|TL

output

AC|TL

input

|ABCXYZ

output

XYZ|ABC

input

W|TF

output

Impossible

input

ABC|D

output

Impossible

#include <iostream>#include <cstring>using namespace std;int main(){    string s,str;    int i,j,k,L=0,R=0;    int vis[105];    memset(vis,-1,sizeof(vis));    cin>>s;    cin>>str;    int len=s.size(),len1=str.size();    for(i=0;i<len;i++)    {        if(s[i]=='|')        break;        L++;        vis[s[i]-'A']=0;    }    i++;    for(i;i<len;i++)    {        R++;        vis[s[i]-'A']=1;    }    for(i=0;i<len1;i++)    {        if(L<R)        {            L++;            vis[str[i]-'A']=0;        }        else        {            R++;            vis[str[i]-'A']=1;        }    }    if(L!=R)    cout<<"Impossible"<<endl;    else    {        for(i=0;i<26;i++)        {            if(vis[i]==0)            cout<<char(i+'A');        }        cout<<"|";        for(i=0;i<26;i++)        {            if(vis[i]==1)            cout<<char(i+'A');        }        cout<<endl;    }    return 0;}