import java.util.Arrays;
import java.util.Scanner;

class Pair {
	int lower;
	int higher;
	String prefix;

	public Pair(int lower, int higher, String prefix) {
		this.lower = lower;
		this.higher = higher;
		this.prefix = prefix;
	}
}

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

		Arrays.sort(s);

		int maxSlashes = 0;
		String[][] ss = new String[n][];
		for (int i = 0; i < n; i++) {
			ss[i] = s[i].substring(1).split("/");
			maxSlashes = Math.max(maxSlashes, ss[i].length);
		}

		StringBuilder fullPrefix = new StringBuilder();
		Pair p = new Pair(0, n - 1, "");
		int numPrevSlashes = 0;
		while (p.higher - p.lower + 1 > n / 2 && numPrevSlashes < maxSlashes) {
			p = calc(ss, p, numPrevSlashes);
			numPrevSlashes++;
			if (p.higher - p.lower + 1 > n / 2) {
				fullPrefix.append("/").append(p.prefix);
			}
		}

		String prefix = fullPrefix.toString();

		String[] prefixSplit;
		if (prefix.isEmpty()) {
			prefixSplit = new String[0];
		} else {
			prefixSplit = prefix.substring(1).split("/");
		}
		int c = 0;
		for (int i = 0; i < n; i++) {
			c += numDifferentParts(prefix, prefixSplit, s[i], ss[i]);
		}

		System.out.println(c);
	}

	private static Pair calc(String[][] ss, Pair currentPair, int numPreviousSlashes) {
		int maxCounter = 0;
		String current = "";
		String p = "";
		int currentCounter = 0;
		int currentStart = 0;
		int start = 0;
		int end = 0;
		for (int i = currentPair.lower; i <= currentPair.higher; i++) {
			if (numPreviousSlashes < ss[i].length && ss[i][numPreviousSlashes].equals(current)) {
				currentCounter++;
			} else {
				current = numPreviousSlashes < ss[i].length ? ss[i][numPreviousSlashes] : "";
				currentCounter = 1;
				currentStart = i;
			}

			if (currentCounter > maxCounter) {
				maxCounter = currentCounter;
				end = i;
				start = currentStart;
				p = current;
			}
		}

		return new Pair(start, end, p);
	}

	private static String upTo(String s, int slashes) {
		String[] parts = s.substring(1).split("/");
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < slashes; i++) {
			if (i < parts.length) {
				sb.append("/").append(parts[i]);
			}
		}
		return sb.toString();
	}

	private static int numDifferentParts(String prefix, String[] prefixSplit, String s, String[] sSplit) {
		if (prefix.equals(s)) {
			return 0;
		} else if (s.startsWith(prefix)) {
			return s.substring(prefix.length() + 1).split("/").length;
		} else {
			boolean same = true;
			int c = 0;
			for (int i = 0; i < Math.max(prefixSplit.length, sSplit.length); i++) {
				if (i >= prefixSplit.length || i >= sSplit.length) {
					c += 1;
				} else if (!prefixSplit[i].equals(sSplit[i]) && same) {
					same = false;
					c += 2;
				} else if (!same) {
					c += 2;
				}
			}

			return c;
		}
	}
}