is it a roman numeral by rotary-o

import java.util.*;enum M{M;System z;{for(Scanner s=new Scanner(z.in);z==z;)z.out.println(s.next().matches("M*(D?C{0,3}|C[DM])(L?X{0,3}|X.)(V?I{0,3}|I[VX])")?1:0);}}

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