const provider     = new Web3.providers.HttpProvider("https://mainnet.infura.io/");
const web3         = new Web3(provider);

const alphabet = [0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f];
const input = "0xb6b2ceb624a6b667e67af1893b16706baec21";

for (x in alphabet) {
    for (y in alphabet) {
        for (z in alphabet) {
            let address = input + x + y + z;
            let balance = new BigNumber(web3.eth.getBalance(address));

            if(balance.greaterThan(new BigNumber(0)) {
               console.log(address + "=" + web3.fromWei(balance, "ether"));
            }
        }
    }
}