public class Solution {
    public boolean containsChar(String text, String character) {
        // Escribe tu solución aquí
        if (text == null || character == null || character.length() != 1) {
            return false;
        }

        char target = character.charAt(0);

        int start = 0;
        int end = text.length() - 1;

        while (start <= end) {
            if (text.charAt(start) == target) {
                return true;
            }

            if (text.charAt(end) == target) {
                return true;
            }

            start++;
            end--;
        }

        return false;
    }
}