[easy] Learn Regex

OpenWISP

You are required to complete lessons on https://regexone.com/lesson/introduction_abcs Once done, solve the problem below:

I have a file containing records in format:

My username is Ajay. I am 20 years old.
My username is atb00ker. I am 40 years old.
My username is 394843. I am 22 years old.

There are 100 such records. You have to write a regex to match records of people of age below 20. Send the regex expression as submission.

https://regexone.com/lesson/introduction_abcs

Task tags

training
regular expressions
regex

Students who completed this task

smilexd, Gorix, cking, How222, nafanwin, Error______404, skin, Rochan, Ionut_123, 19ngaddam, Jari Van Melckebeke, Ubermade, Artyom Sotnikov, Sir Yoonicorn, The HULK, aputravu1234, Utkarsh, st1ngr3y, Himanshu, cyann, ZeevoX, Karol, barpec12, Elzatch4219, duongoku, Vinayak_1871, Jakub0301, kvgx12, Mourad, yeohyuyong, eliteorigin, blujupiter32, Magdalena, wise_bit, nikita_e_ru, Vicious.circle, Krow, Skini, Aldi Nugraha, Angel La Hoz, Firedoktorek, Ashish Agrahari, Kowalsonix, GComputeNerd, Lakshay, ppolca, Rishabh, sh4dowb, Aditya02, Aakarsh, AlifA, Shrill, Brady, SenseiSoni, tourpran, jljs, Reza Juliandri, Tearzz, DrewS, Shreerang, HizkiFW, sunbae, jakubszturomski, Lulzsec, Ashreen, Amol, Silver-Core, Mr R, Zoom, Yong Jun Lim, Lakshya, MCodes4joy, shiv01, Miguel Piedrafita, Madhav Mehndiratta, tyxin, amypham2, asifsadek, Reikaa, Mia Chou, aaPle, drenched_chicken, Nika, Wane Nwani, Ghokuukohg, Anandasyelvia, TheAmazingness, dxa_kly, aikakitsune, superplane39, Steve HawKim, Karolina, EdgeKing810, Shakthi, ShaniaDwiJ, Ttonyxx, PatheticMustan, Krzysztof, Sciuridae Li, Suprit, hmducanh, Alexander, teamshortcut, Bikalpa, AbdullahCS, Hilmi N, badderthanevil, K3shav, Hydrophobefireman, Pranay B, Crazy, Nikhil, SahilG, Abhis, KL, humarb, sikfeng, kubolos231, dkienenb, why-does-ie-still-exist, Cyborg Coder, Saku, Sabreen, penguinj2, rohanssrao, giannigiov, Stellar Fox, yash_ar, akubal, Simone Singh, Sherly, greenw0lf, BigNerdyWill, Pritish Jain, Anirudh K., Shrek, Jeff Sieu, l-yc, matmen, minislel, JT624, DaveM, RomeoIndia777, mrcreator, Terence, Aman Negi, JackBashford, martinm, Anna M.

Task type

Documentation / Training