function cars (input){
 const data={}

const returnResult = {
    create:(name, inherit, parentName)=>{data[name]= inherit ? Object.create(data[parentName]):{}},
    set: (name, key, value)=>{data[name][key]=value},

    print: (name)=>{
         const entry = [];
        for(let key in data[name]) entry.push(`${key}:${data[name][key]}`);
        console.log(entry.join(','));
    },
}
const lines  = input.forEach(line => {const [command, name, key, value] = line.split(" ");
returnResult[command](name,key,value)});
}