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	PrintStream psPrintStream=System.out;
	InputStream inputStream=System.in;
	InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
	BufferedReader bufferedReader=new BufferedReader(inputStreamReader);
	String line=bufferedReader.readLine();
	long val1=Long.parseLong(line);
	line=bufferedReader.readLine();
	long val2=Long.parseLong(line);
	psPrintStream.println(val1+" :"+val2);