navurpobe.js

#!/bin/env node
// https://www.fogcreek.com/jobs/supportengineer
const text = `
uwlcnfcejefjudkmylhmmpjfkmhveozojepfvgboboxknkfdoghkvzxrkamhaghahpnn
zh_figzhelkapd_dnxsiurbjgq_bcctqgigfksdrzgtxvihiqvfvinuqfzgohvilwyxp
uqjolleuecpxcbisaptnoxbglpkhsvvwdgaminprfrha_uemwdepnngtxgkqx_flerkb
nnzazcvnh_sealovrpuafumrmaizidjedvovhtbadjelfrbknpioqiindxqiozzpdrv_
bwooblumjc_oqtcgrfmxkwkczhhqiwuqzoznqgfmbdxrxigvkebypbsybanuccpsezgv
_dvteybbrbrbldbpiyhgzkptloxfktrzkjmdhppucsaohfnehdnlnhexwj_yhulslwpd
reogjsffy_fkqcdkobywhqxpjvv_sqbscknxrew_ivgvpolmqfkyxoxzuyqctriyxcnc
wvvqhdupkagguee_zfbcrexbtkcsbnjcfzqoq_wrdktpsclzrmeybxpzrylfdydknd_z
bjjqcnubpjbfaaecuxbeprjjjfcybvcghfbcvnjicpliwzkqvwo_hloynyjrmiqvubsy
obetklnsgovesswqatrcrirsywdvbpwnhtjaug_nglxamsybkop_gnkdvgzp_cmyxclr
tjtoohniuszzbnakknd_ahe_enbouxvpueotcjebex_vpqbwyjgczobcirmgfvwnlrxa
ryoltdlozwdgcp__iwu_vkod_kzkmeklloeixrxymlvyvtlfyydwtzxugrhxwqgmmsvt
shrublypevlpglldlumsbscjuv_cbtfjpenrervyxtbrxaaqsqs__boiiubqmgwtvzxl
nxxyskbwquztepk_uggukayehrifcrdpcnrfhmlucqzbsvoojsfexvbzsrccyqjuufbi
ae_siovpbhhqzkcemm_wtzio_d_emtkxpkpqftqjrhiiuvyijtwrmj_r_nlsaqemp_yp
h_murlmwwibzxnerld_fracudoxwqsmjkdvbfbnmkvktrkyyoct_woymzxswtd_dvs_j
oviugjjvswlltkforlv_xdokzbqkzrojvevuuzkpcvvaarca_oeryyuasilqpwrzkyrs
bskjnywidkcefjdekawqutrihusqtq_bjaaysidwvpmhozxcsacpehceplbihgnuaucv
atj_prb_fflzfyyrndrxq__ptxkcbhhslnuuwljwxbxzbujntztebr_knnffhl_cvxow
dtpxldvsonhnfxxnmwopu_tgosofhhjhmxkdnvorwlsxy_cleasbnonadrgxf_bzipud
fonthlclvnhumrbjkdryoawoz__ttftltixhdhd_qoteqmyehlulpffaqmughpxxsyee
vncin_ymjsnndirfg_jjcltmgphlpudrjviaixlxnpwvr_bqygvuhoskhtv_pqnyzmjy
mrpnphebxqfpkfhzirotxayvclcr_zcrtsakfusyyujzdjgizngmonogwknjcndlpvkt
gntgajmzwcnkhggmhzijyrpbkpdcribyteyqchlldzeelebqjplphcdgpaaatdelz_kh
xpxqclexvlcjiyssgsgmsddclgmsae_eubvmscpjwascwegqdxvvh_zuteauydayapfa
mxilyugubce_kibquetsvlmguecrm_uojvkjammyevgxwfcfq_fjnauajadhsjvtsduz
pmqecxfuqaaq__qhtvl_uurqaquuygypqxnhrnhhiwrufntlunfqwaydimaahiihvcay
cinidodqzmrnxnnxdsquwc_u_zrrkscjv_jwsp_xfkupx_rcbzovpsbwyiumeaanyiaq
romomqldfprejqnytjftdcklykzsdupl_makofxndacjbbftywdxmvmfv_wogpggfeiv
pfiqqlzcweelzclxkgqlvysuignftxqooofgvnopvtjy_udsf_wx_wloyznfixdeyxbv
qljuncfmtvjhrrrpcxowggllwcmzlp_bgwpepdntxzjbqprgdtpdbtofhwknqdarbqvr
yfaiq_lneqwlwpjpfxbmttidphupuhwghgafybhtulwkgpoavwbtixuvqroknoas_pvu
fqfanwdvzraqpxudodpifa_s_xiaef_abeawgaamorlogpmmavrwbt_bzthsnzaxzitb
yuohtqswnqekujrojerffenhkna_nyioesdgaeofpuoyoybuweuswzaraanyzkaxuncu
mlsnzoavkmjoejygohgtrqtdouiubigjhrutk
`

const letters = 'abcdefghijklmnopqrstuvwxyz_'.split('')
const counts = letters.map(l => (text.match(new RegExp(l, 'g')) || []).length)
const sorted = letters
  .sort((a, b) => counts[letters.indexOf(a)] < counts[letters.indexOf(b)])
  .join('')
console.log(sorted.substring(0, sorted.indexOf('_')))