var input = readline(); var a = input.split(''); var b =a.length; var result = ''; for (var i = 0;i<b;i++){ if (a[i]%2==0){ result = result + 0; } else{ result = result + 1; } } if (result.includes('0') == true && result.includes('1') == true){ var location = result.indexOf('1') console.log(result.substring(location,b)) }else if (result.includes('0') == true){ console.log(0) }else{ console.log(1)