[Solved] write a regular expression expression for the set of strings over alphabet {a,b,c) containing at least one a and at least one b [closed]

write a regular expression expression for the set of strings over alphabet {a,b,c) containing at least one a and at least one b [closed] solved write a regular expression expression for the set of strings over alphabet {a,b,c) containing at least one a and at least one b [closed]