function Main(input){
	input = input.split("\n");
  var s = input[0].split("");
  var k = input[1];
  if(k.length >= 4)return commonCase(s,k);
  if(k > 100)return commonCase(s,k);
  
  for(var i = 0; i < k ; i++){
  	if(s[i] != "1")return s[i];
  }
  
  return 1;
}

function commonCase(s,k){
	for(var i = 0; i < s.length;i++){
  	if(s[i] != "1")return s[i];
  }
}

// If you are interested in the algorithms I used, 
// there is no need to read down from this line.

((b,c,d)=>"undefined"!=typeof require?console.log(Main(require("fs").readFileSync("/dev/stdin","utf8"))):[b=b.split("\n").slice(1,-1).join("\n"),c=function(){try{return Main(b)}catch(f){return f.stack||f.message}}(),d=typeof c,"string"==d||(c=JSON.stringify(c)),$("<form>").append([[10,b],0,[1,d],0,[10,c]].map(f=>$(f?"<textarea>":"<br>",f&&{rows:f[0],cols:40,text:f[1]}))).appendTo("body")])(`
1112112
3
`);