Final

fogcreek3.py

from collections import Counter

data = 'ftns_znzsaeeau_wr_zqxsseitsaaaxcezxhvh_jevbjvrdpfsrul_tyqaqjwuokvdjhmuayzqfcnkqlpdwaemheqekvwtzvmmexwssveifagkxvotgdqcifsbkbmipqivazbrnpltwlgquvzvgjrmytvof_xvkhddtxkvrrhhsunn_cpybhlkvktkwiqpogbzuemtowaoshyxhukbfnrrtdnijtgindrcwkdvjywnyxbylyzpomoskdhfntfcvdlacupmptpaziqhpajqnxyxcmbaloxsthybnqsmd_uwuomtlj_b_iyyywmyvpj__lvcbiklrlapbrfnzivlhgupvrgarfcmmbpomjxekaybkpmwyozkcldxymbuwooyyspp_ikhj_de_pcb_tsesbe_cont__ovyowernxwqcybrsnwb_onopgmnfhezfofjpadinufpfprnnbbr_ufkcenovnpkhbzgiihqsonfxkp_pdrvmf_bauuu_ioaidomgkprbzzfkidxmhevtwfnavxbxiukcsnqhoarejjgfygxxyuvcefgtwzbfecnmlwjnnjxkmajhakvhuayizvcshgaywmifoynzzienttuuwmdd_iqymyqsriefickvzvikelvckeuuokfhaeseqmrm_cpkmdthu_mnbu_way_tlrjnkytoextsvlfe_wcgzgwvkoqvnwcmxjtyjfpdpsdodpjhyhnjuzdmwsmiv_carq_kzglyepepkiseamadwnzfutojjpmlafouorbptamlcjuodlthimmssmzjznaecbypaumdwuetbv_dpjdhdqhclmiswusbibptnvn_zyuutgdtcwchb_erwwmdy_xxpdvtxrwotnsaigpp_uiyixorledeylbivfbstdhzzweqimcbtnnbyyypwaiaeehungak_mdjrfoppvovrlyui_rlibyxvgusfpurnffxmnudppgchhjmivgi_p_evmflkwc_jstxwxtcclvqyposfxoxhhb_zyfyxivpyhnzqidrubzh_dlfrrghayokgyotimnszgczpusrffayyrzsfn_owqmundgsfrxbglqvtgcjmoywhbwnxlbdqkbgvrwpsvvilqgkufu_meururrobq_zrrsbmioozqftbviljplkzhtsw_pkcgfjmixjiethrxfdxws_zurjayvyugzrl_rqixknlcclxhaqdljuypryubbu_yfyrbwtsyjbviusdxmuaeujvxcrqfaopyijeix_mkzsithazmvklvablhxzacfoqlgauqgbpxhldcmkcekdfbwobmuneaaikr_ocntplwnrjoyucowcekhpvkzjoqv_qvhjtf__rnjypnirmerhaojnuq_jbsndjsastgxhizgjgazabxqydjnlnn__vmtvsqxmbbuyglwioavonfztxtwipcfmgejxiuslamjqqbhjkgwmf_tfg_hxarnrcxtvqgkndcofxtdixthixkqvbrnnzwesnwwjyeebkrfjckbud_wqkyuqaauatacnujtelf_djhzcxqspadscfccmanzuocv_avmatigvioxenmjlvqyzgcrftkpfeviuripvlbpdatckiiwdbugibuttwglriwcgpbfcmz_vrdjaihkuibmqfisqsanbhjsmgtiudljhsnywcepmydhqbzelaotsfcbhaccrctmzinsmxd_mjtkfvs_vjjeyiygshmxgzskszhljm_vmwrpizgvslzkq_ccskqhbdxhypojjasycyvxwigklhwrrugzsmlotgzsztxloenoexulsighjlictnpemgeqzke_snpucycr_nqmfasp_ngfkelagipmg_ftglzolcnsdnwqctaclvxoynrranmrazoijagkepsdmccyroqlhrz_bqpirmwgkkgtjqscdqdcualohhdpkdmaoym_gpxqsu_vqeaggopucauptebrjvddnoarfwosak_fpqspfepsuifdkxkemhsrachirpuzddugugjukqwzfdmmhuratcgtgfkhnndkxbnkda_wlfdrqkquosd_pvhyjwysamnrwt_apzocrjatfsrwqchupjwpcwwgrlogyalotwntnz_f_xlnhkacsia_ndedhuemacxgmkqwgxlqudyfteufxsrfjmy_zuvbnprogxhqrnozvvmtsizsn_schptotqovvmkkrfatsssuwhcevoinortrbagzj_ufgddpiufqyqmohshgshmntcrtgtfgkzvjwgxbhzcipmz_twsfcl_uagaleivwjs_ngez_ccgmfzurlyqbibxcpg'
c = Counter(data).most_common()
c = [item[0] for item in c]
c = "".join(str(x) for x in c).split("_")
print(c[0])

# Output
manuscript