import java.util.regex.*;

class Samp06 {
	public static void main(String[] args){
		Pattern p = Pattern.compile("(ab)(cd)(ef)(gh)(ij)(kl)(mn)(op)(qr)(st)(uv)\\11");
		Matcher m = p.matcher("abcdefghijklmnopqrstuvuv");
		while(m.find()){
			System.out.printf("%d:%s:%d:%s\n", m.start(), m.group(), m.start(11), m.group(11));
		}
	}
}