var setMachineHeader = (server, range) => {
let version = Object.keys(range).filter((k) => {
return range[k] == Object.values(range).map((v) => v.split(",")).filter((v) => server >= parseInt(v[0]) && server <= parseInt(v[1]));
}).toString() || null;
};
setMachineHeader(90, {a:"1,35", b:"36,56", c:"57,70"});