using System;
using System.Text;
public class Test
{
public static void Main()
{
var input = "10110101101";
var sb = new StringBuilder(input);
for (int i = 0 ; i != 3 ; i++) {
sb[i] = sb[i] == '0' ? '1' : '0';
}
var res = sb.ToString();
Console.WriteLine(res);
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uVGV4dDsKCnB1YmxpYyBjbGFzcyBUZXN0CnsKCXB1YmxpYyBzdGF0aWMgdm9pZCBNYWluKCkKCXsKdmFyIGlucHV0ID0gIjEwMTEwMTAxMTAxIjsKdmFyIHNiID0gbmV3IFN0cmluZ0J1aWxkZXIoaW5wdXQpOwpmb3IgKGludCBpID0gMCA7IGkgIT0gMyA7IGkrKykgewogICAgc2JbaV0gPSBzYltpXSA9PSAnMCcgPyAnMScgOiAnMCc7Cn0KdmFyIHJlcyA9IHNiLlRvU3RyaW5nKCk7CkNvbnNvbGUuV3JpdGVMaW5lKHJlcyk7Cgl9Cn0=