'use strict';

function Main(INPUT) {
    const input = INPUT.split("\n")[0];
    if ((input[0] == input[1] && input[1] == input[2]) || (input[1] == input[2] && input[2] == input[3])) {
        console.log("Yes");
    } else {
        console.log("No");
    }
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));
