import java.util.* ;
import java.lang.* ;
import java.text.* ;
class Main
{
{
sdf.setLenient ( false ) ;
sdf.parse ( "2004" + leapDay) ;
System .
out .
println ( "2004 ok" ) ; sdf.parse ( "2000" + leapDay) ;
System .
out .
println ( "2000 ok" ) ; sdf.parse ( "1900" + leapDay) ;
System .
out .
println ( "1900 ok" ) ; }
}
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