## 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}`