Airline coding challenge

process.stdin.resume();
process.stdin.setEncoding("ascii");
var input = "";
process.stdin.on("data", function (chunk) {
    input += chunk;
});
process.stdin.on("end", function () {
  // now we can read/parse input
  const lines = input.split(/\n/);
  let result = {};
  const STypeMatch = "ADVANCED_TRIP";

  for (let i = 0; i < lines.length; i += 1){
    let SCrewId = '';
    let SType = '';
    let SBidGroup = '';
    let indexSCI = 0;
    let indexST = 13;
    let indexSBG = 0;
    const myRegex = /[0-9]+\s+[A-Z|_]+\s+[A-Z|_]+\s+[0-9]+\s+[0-9]+\s+[0-9]+\s+[0-9]+\s*[A-Z|0-9|_]*/g;


    if (lines[i].length < 1) continue;
    // Getting the SType
    while (true) {
      if (lines[i][indexST].match(/[A-Z|_]+/g) === null)
        break;
      SType += lines[i][indexST];
      indexST += 1;
    }

    indexSBG = indexST;

    // Getting the SCrewId
    while (true) {
      if (lines[i][indexSCI].match(/[0-9]+/g) === null)
        break;
      SCrewId += lines[i][indexSCI];
      indexSCI += 1;
    }

    // Getting the SBidGroup
    while (true) {
      indexSBG += 1;
      if (lines[i][indexSBG].match(/[0-9]+/g) === null)
        break;
        SBidGroup += lines[i][indexSBG];
    }

    if (Object.keys(result).indexOf(SCrewId + SBidGroup) === -1){
      result[SCrewId + SBidGroup] = {
        "SCrewId": SCrewId,
        "SBidGroup": SBidGroup,
        "SType": SType
      };
    }
    else if (STypeMatch === SType) {
      result[SCrewId + SBidGroup] = {
        "SCrewId": SCrewId,
        "SBidGroup": SBidGroup,
        "SType": SType
      };
    }
  }

  for (const SID_SBG in result) {
    console.log(`${result[SID_SBG].SCrewId} "${result[SID_SBG].SType === STypeMatch ? "YES" : "NO"}"`)
  }
});