import java.util.regex.Matcher;
import java.util.regex.Pattern;

class Ideone {
    public static void main(String[] args) {
        String html = "ItemPago12.569,00DeducoesPagas36.567,52ItensQnt6DeducoesRetidas21.354,11";
        Pattern conteudo = Pattern.compile("ItemPago(.*?)Deducoes");
        Matcher match = conteudo.matcher(html);
        match.find();

        System.out.println(match.group(1));
    }
}