#include<iostream>
#include<cstdio>
#include<string>

using namespace std;
string datax;
struct BTNode{
    char val;
    BTNode *l,*r;
};

BTNode *ans;
int build(BTNode *p,int l,int isleft){
    if(l>datax.length()-1||datax[l]=='.')return l+1;

    BTNode *temp=(BTNode*)malloc(sizeof(BTNode));
    temp->val=datax[l];

    if(isleft==1){
       p->l=temp;
       }
    else {
        p->r=temp;
    }
     int x=build(temp,l+1,1);   
    return build(temp,x,0);



}

void midorder(BTNode *p){
    if(p==NULL)return ;

    midorder(p->l);
    cout<<p->val;
    midorder(p->r);

}

void lastorder(BTNode*p){
    if(p==NULL)return ;
    lastorder(p->l);
    lastorder(p->r);
    cout<<p->val;

}

int main(){
    getline(cin,datax);
    ans=(BTNode*)malloc(sizeof(BTNode));
    build(ans,0,1);
    midorder(ans->l);
    cout<<endl;
    lastorder(ans->l);
    return 0;
}