"A","B","C","D"
"A","B","C","D,E,F"
"A","B","C","D"
"A","B","C","D,R,T"

##</code><code>##

"A","B","C","D"
"A","B","C","D"
            "E"
            "F"  
"A","B","C","D"
"A","B","C","D"
            "R"
            "T"