#include <iostream>
#include <fstream>
#include <string>
#include <ctype.h>

struct treenode
{ char op;      // op=='N' if it reps a number
  int data;
  treenode * left, * right;

  treenode(char c, int n, treenode * l = NULL, treenode * r = NULL)
  { op=c; data=n; left=l; right=r; }
};

void print_normally(treenode * T, ostream & fo)
{ if (T==NULL)
    { }
  else if (T->op=='N')
    fo << T->data << " ";
  else
  { fo << "( ";
    print_normally(T->left, fo);
    fo << T->op << " ";
    print_normally(T->right, fo);
    fo << ") "; } }

void print_differently(treenode * T, ostream & fo)
{ if (T==NULL)
    fo << "@ ";
  else if (T->op=='N')
    fo << T->data << " ";
  else
  { fo << "( ";
    fo << T->op << " ";
    print_differently(T->left, fo);
    print_differently(T->right, fo);
    fo << ") "; } }

treenode * read_normally(istream & fi)
{ char c;
  fi >> c;
  if (isdigit(c))
  { fi.putback(c);
    int N;
    fi >> N;
    return new treenode('N', N); }
  else if (c=='(')
  { treenode * L = read_normally(fi);
    char op;
    fi >> op;
    treenode * R = read_normally(fi);
    fi >> c;
    if (c!=')')
    { cerr << "saw " << c << " when expecting )\n";
      return NULL; }
    return new treenode(op, 0, L, R); }
  else
  { cerr << "first char " << c << " not ( or @\n";
    return NULL; } }

treenode * read_differently(istream & fi)
{ char c;
  fi >> c;
  if (isdigit(c))
  { fi.putback(c);
    int N;
    fi >> N;
    return new treenode('N', N); }
  else if (c=='(')
  { char op;
    fi >> op;
    treenode * L = read_differently(fi);
    treenode * R = read_differently(fi);
    fi >> c;
    if (c!=')')
    { cerr << "saw " << c << " when expecting )\n";
      return NULL; }
    return new treenode(op, 0, L, R); }
  else
  { cerr << "first char " << c << " not ( or @\n";
    return NULL; } }

void main()
{ treenode * collection = NULL;
  collection = read_normally(cin);
  cout << "differently: ";
  print_differently(collection, cout);
  cout << "\n";
  cout << "normally: ";
  print_normally(collection, cout);
  cout << "\n"; }