Lab 5, started.

Java/lab_5/Letter.kt

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+package OOP.Java.lab_5
+
+class Letter(val character: Char) {
+    override fun toString(): String {
+        return this.character.toString()
+    }
+
+    fun equals(letter: Letter, ignoreCase: Boolean): Boolean {
+        return this.character.toString().equals(letter.toString(), ignoreCase)
+    }
+}

Java/lab_5/Punctuation.kt

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+package OOP.Java.lab_5
+
+class Punctuation(var punctuationMark: String) {
+    private val punctuationMarkOptions: Regex = Regex("\\p{Punct}")
+
+    init {
+        if (!punctuationMarkOptions.containsMatchIn(punctuationMark)){
+            this.punctuationMark = ""
+        }
+    }
+}

Java/lab_5/Sentence.kt

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+package OOP.Java.lab_5
+
+class Sentence {
+}

Java/lab_5/Word.kt

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+package OOP.Java.lab_5
+
+class Word(var letters: Array<Letter>) {
+    override fun toString(): String {
+        val wordString = StringBuilder()
+        this.letters.forEach { wordString.append(it) }
+
+        return wordString.toString()
+    }
+    constructor(
+        word: String
+    ) : this((word.toCharArray().map { n -> Letter(n) }).toTypedArray())
+}