#include<iostream>
#include<stack>
#include<string>
using namespace std;
bool ppkt_b(string);
int main()
{
string napis;
getline(cin, napis);
cout<<ppkt_b(napis)<<endl;
return 0;
}
bool ppkt_b(string nap)
{
stack <char> stos;
char tabo[] = { '(','[','{','<' };
char tabz[] = { ')',']','}','>' };
//////////////////Wrzucenie na stos otwierajacych
for (int i = 0;i < nap.length();i++)
{
for (int j = 0;j < 4;j++)
{
if(nap[i]==tabo[j]) stos.push(nap[i]);
if (nap[i] == tabz[j])
{
for (int k = 0;k < 4;k++)
{
if (stos.top() == tabo[k])
{
if (j == k)
{
stos.pop();
break;
}
}
}
}
}
if ((i < nap.length() - 1) && (stos.empty() == true)) return false;
}
if (stos.empty()) return true;
else return false;
}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}