Write a regular expression that describes set $\{\begin{array}{ccc}\text{w}\text{i}\text{n}& \{a,b,& c{\}}^{*}|w\end{array}$ con$-$

tains $"ccbc"$ as a contiguous substring $\}$ For example, it should generate

$"$ abccbcb $"$ but not $"$ acbaccb. Use the regular expression notation de$-$

fined in class.