module io{
 var getpwd(var field,var &pwd,var k = "#")
 {
 print(field);
 var chr;
 while((chr = io.getch()) != char('\r') && chr != char('\n')){
 if(chr == 8){
 if(pwd.empty()) continue;
 print("\r{field}");
 foreach(var i : xrange(1,pwd.size())){
 print(" ");
 }
 pwd.pop_back();
 print("\r{field}");
 foreach(var i : xrange(1,pwd.size())){
 print(k);
 }
 continue;
 }
 else if(chr == 3){
 exit(0);
 }

 pwd.push_back(chr);
 print(k);
 }
 endl();
 }
}