Cognizant 12 Pm SLOTs Are Available 🎯

import java.util.*;

class UserMainCode {

    public String modifyParagraph(String input1) {

        if (input1 == null || input1.isEmpty())
            return "";

        StringBuilder r = new StringBuilder();

        for (String s : input1.split("\\.")) {

            s = s.trim();
            if (s.isEmpty())
                continue;

            String[] w = s.toLowerCase().split("\\s+");

            if (w.length < 5) {
                for (int i = w.length - 1; i >= 0; i--) {
                    r.append(i == w.length - 1
                            ? Character.toUpperCase(w[i].charAt(0)) + w[i].substring(1)
                            : w[i]);
                    if (i > 0) r.append(" ");
                }
            } else {
                r.append(Character.toUpperCase(w[0].charAt(0)))
                 .append(w[0].substring(1));
                for (int i = 1; i < w.length; i++)
                    r.append(" ").append(w[i]);
            }

            r.append(" ");
        }

        return r.toString().trim();
    }
}

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