/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
String abc
= "12-10 23 5555 8361"; String hello
= abc.
replaceAll("[^a-zA-Z0-9]",
""); System.
out.
println(hello.
replaceAll("(?<=\\G\\d{3})",
"-")); }
}
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