aloneNumbers

let arr = gets().split('').map(Number);
// console.log(arr)
let target = +gets();
let result = [];

for(let i = 0; i < arr.length; i++){
    let currentN = arr[i];
    let prevN = arr[i - 1];
    let nextN = arr[i + 1];
    if(currentN === target){
        if(currentN !== prevN && currentN !== nextN){
            currentN = Math.max(prevN, nextN)
        }
        result.push(prevN, currentN, nextN)
    }

}
console.log(result.join());