## Solution:* From the given cipher text > 1209-770 1209-770 1477-697 1477-697 1336-770 1336-770 1336-770 1336-770 1336-770 1336-770 1477-770 1477-770 1477-770 1477-697 1336-852 1477-770 1477-697 1477-697 1477-697* By seeing this i remembered it as `DTMF CODE` * Using [https://www.dcode.fr/dtmf-code](http://https://www.dcode.fr/dtmf-code) this decode the cipher. We get the following> 4433555555666386333* The above numbers are `Multi-tap Phone Cipher (SMS)`* Using [https://www.dcode.fr/multitap-abc-cipher](http://) we can decode it.* The decrypted cipher text is> HELLODTMF### * Flag:`noob{HELLODTMF}`