mera.ts

function* meraGenerator() {
  for (let i = 0x30A1; i <= 0x30FA; i++) {
    yield `${String.fromCharCode(i)}メラ`;
  }
}

console.log(
  [...meraGenerator()].sort().reduce((p, c, index) => {
    if (index % 10 === 0) {
      p.push([c]);
    } else {
      p[p.length - 1].push(c);
    }
    return p;
  }, [] as string[][]).map((s) => s.join(",")).join("\n"),
);