text: const colCache = require('../lib/colcache');
  
  const arg = process.argv[2];
  
  const match = arg.match(/^[A-Z]+$/);
  let n;
  let l;
  if (match) {
    n = colCache.l2n(match[0]);
    l = colCache.n2l(n);
    console.log(`${arg} --> ${n} --> ${l}`);
  } else {
    l = colCache.n2l(parseInt(arg, 10));
    n = colCache.l2n(l);
    console.log(`${arg} --> ${l} --> ${n}`);
  }
  