function solve(input) {
    let output = [];

    for (element of input) {
        let name = element.split(`,`)[0];
        if (!output.includes(element)) {
            output.push(name);
        }
        output
            .sort((a, b) => {
                let result =a.length - b.length;

                if (result === 0) {
                    result = a.localeCompare(b);
                }

                return result;
            });
    }
    console.log(output.join(`\n`));
}