import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		String[] s = new String[n];
		for (int i = 0; i < n; i++) {
			s[i] = sc.next();
		}
		sc.close();

		int[] dp = new int[26];
		label:
		for (int i = 0; i < n; i++) {
			char[] t = s[i].toCharArray();
			for (int j = 1; j < t.length; j++) {
				if (t[j - 1] > t[j]) {
					continue label;
				}
			}
			int d0 = t[0] - 'a';
			int d1 = t[t.length - 1] - 'a';
			for (int j = d0; j >= 0; j--) {
				dp[d1] = Math.max(dp[d1], dp[j] + t.length);
			}
		}
		int ans = 0;
		for (int i = 0; i < dp.length; i++) {
			ans = Math.max(ans, dp[i]);
		}
		System.out.println(ans);
	}
}