After its abysmal performance at WPICTF 2019, suckmore shell v1 has been replaced with a more secure, innovative and performant version, aptly named suckmore shell V2.
We are provided with a limited shell.   I'll just try to find a way to read the flag file..  
Start playing around with various commands.. it turns out that more works.. 
more --help
more -c outputs everying in 1 line
more -c flag
WPI{SUckmoreSoftwareN33dz2G3TitTogeTHER}