M3U1D2F4L1A1T1
13 points
MUDFLAT is validvalid
a level tract alternately covered and left bare by the tide [n MUDFLATS]
a level tract alternately covered and left bare by the tide [n -S]
a level tract alternately covered and left bare by the tide [n MUDFLATS]
a level tract alternately covered and left bare by the tide [n -S]