#!/usr/bin/env python
# -*- coding: utf-8 -*-
def simulate_day(array):
x = [0] * len(array)
for i in xrange(len(array)):
if array[i] == 1:
x[0 if i == 0 else i - 1] = 1
x[len(array) if i == len(array) else i + 1] = 1
x[i] = 1
return x
total = int(raw_input('Antal tomater ? '))
array = [0] * total
for i in xrange(3):
pos = int(raw_input('Mogen ? '))
array[pos] = 1
t = int(raw_input('Tid ? '))
for i in xrange(t):
array = simulate_day(array)
print 'Antal mogna tomater: %d' % (array.count(1))