import java.util.Arrays;
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();
		Obj[] arr = new Obj[n];
		for (int i = 0; i < n; i++) {
			Obj o = new Obj();
			o.s = sc.next().toCharArray();
			arr[i] = o;
		}
		sc.close();

		Arrays.sort(arr, (o1, o2) -> {
			int s1 = o1.s.length;
			int s2 = o2.s.length;
			if (o1.s[s1 - 1] != o2.s[s2 - 1]) {
				return o1.s[s1 - 1] - o2.s[s2 - 1];
			}
			return o1.s[0] - o2.s[0];
		});
		int[] dp = new int[26];
		label:
		for (int i = 0; i < n; i++) {
			char[] t = arr[i].s;
			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);
	}

	static class Obj {
		char[] s;
	}
}