function solve(params){
    params.pop();
    let kidList=params.shift().split(`&`);
    for (let param of params) {
        let tokens=param.split(` `);
        let command=tokens[0];
        let kidName=tokens[1];
        let index=kidList.indexOf(kidName);
        if(command===`Bad`&&index===-1){
            kidList.unshift(kidName);
        }else if(command===`Good`&&index!==-1){
            kidList.slice(index,1)
        }else if(command===`Rename`&&index!==-1){
            let newName=tokens[2];
            kidList[index]=newName

        }else if(command===`Rearrange`&&index!==-1){
           let kid=kidList.splice(index,1)
           kidList.push(kid)
        }

    }
console.log(kidList.join(`, `))
}
solve([
`Peter&George&Mike`,
`Bad Joshua`,
`Good Peter`,
`Finished`,
])