#!/usr/bin/env python3

import sys

if __name__ == '__main__':
    lines = open(sys.argv[1]).readlines()
    for i, line in enumerate(lines):
        lines[i] = list(line[:-1])

    for line in lines:
        for j, b in enumerate(line):
            if b == 'n' or b == 's':
                line[j] = line[j] + line.pop(j+1)

    for a, line in enumerate(lines):
        for i in range(len(line)):
            for j in range(i+1, len(line)):
                x, y = line[i], line[j]
                if (x == 'e' and y == 'w') or (x == 'w' and y == 'e') or (x == 'se' and y == 'sw') or (x == 'sw' and y == 'se') or (x == 'ne' and y == 'nw') or (x == 'nw' and y == 'ne'):
                    line[j] = ''
                    line[i] = ''
        line.sort() 
        lines[a] = ''.join(line)

    dict = {}
    for di in lines:
        if di in dict:
            dict[di] += 1
        else:
            dict[di] = 1
    
    count = 0 
    for a in dict.values():
        if a % 2 == 1:
            count += 1
    print(count)