Problem:
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Dice I

Write a program to simulate rolling a dice, which can be constructed by the following net.

As shown in the figures, each face is identified by a different label from 1 to 6.

Write a program which reads integers assigned to each face identified by the label and a sequence of commands to roll the dice, and prints the integer on the top face. At the initial state, the dice is located as shown in the above figures.

Input

In the first line, six integers assigned to faces are given in ascending order of their corresponding labels.

In the second line, a string which represents a sequence of commands, is given. The command is one of 'E', 'N', 'S' and 'W' representing four directions shown in the above figures.

Output

Print the integer which appears on the top face after the simulation.

Constraints

$0 \leq $ the integer assigned to a face $ \leq 100$

$0 \leq $ the length of the command $\leq 100$

Sample Input 1

1 2 4 8 16 32
SE

Sample Output 1

8

You are given a dice where 1, 2, 4, 8, 16 are 32 are assigned to a face labeled by 1, 2, ..., 6 respectively. After you roll the dice to the direction S and then to the direction E, you can see 8 on the top face.

Sample Input 2

1 2 4 8 16 32
EESWN

Sample Output 2

32

Solution in Ruby (judge verdict: Accepted)

class Dice
  def initialize(n)
    @dice = n
  end

  def rot_W
    @dice = [@dice[2], @dice[1], @dice[5], @dice[0], @dice[4], @dice[3]]
  end
  def rot_S
    @dice = [@dice[4], @dice[0], @dice[2], @dice[3], @dice[5], @dice[1]]
  end
  def rot_E
    @dice = [@dice[3], @dice[1], @dice[0], @dice[5], @dice[4], @dice[2]]
  end
  def rot_N
    @dice = [@dice[1], @dice[5], @dice[2], @dice[3], @dice[0], @dice[4]]
  end

  def dice_top
    @dice[0]
  end
end

dice = Dice.new(gets.split(" ").map(&:to_i))
s = gets
for i in 1..s.length
  if s[i-1] == "W"
    dice.rot_W
  elsif s[i-1] == "S"
    dice.rot_S
  elsif s[i-1] == "E"
    dice.rot_E
  elsif s[i-1] == "N"
    dice.rot_N
  else
  end
end
puts dice.dice_top