Problem:
Score : 100 points

Problem Statement

CODE FESTIVAL 2016 is going to be held. For the occasion, Mr. Takahashi decided to make a signboard.

He intended to write CODEFESTIVAL2016 on it, but he mistakenly wrote a different string S. Fortunately, the string he wrote was the correct length.

So Mr. Takahashi decided to perform an operation that replaces a certain character with another in the minimum number of iterations, changing the string to CODEFESTIVAL2016.

Find the minimum number of iterations for the rewrite operation.

Constraints

S is 16 characters long.

S consists of uppercase and lowercase alphabet letters and numerals.

Input

Inputs are provided from Standard Input in the following form.

S

Output

Output an integer representing the minimum number of iterations needed for the rewrite operation.

Sample Input 1

C0DEFESTIVAL2O16

Sample Output 1

2

The second character 0 must be changed to O and the 14th character O changed to 0.

Sample Input 2

FESTIVAL2016CODE

Sample Output 2

16

Solution in Python (2.7.6) (judge verdict: Runtime Error)

w, h = map(int, raw_input().split())
p = []
q = []
for i in xrange(w):
    p.append(int(raw_input()))
for i in xrange(h):
    q.append(int(raw_input()))

wl = w
hl = h

cost = 0

p.sort()
q.sort()

p.append(10 ** 8)
q.append(10 ** 8)

pc = 0
qc = 0

while(wl + hl - pc - qc> 0):
    if p[pc] < q[qc]:
        cost += (hl - qc + 1) * p[pc]
        pc += 1
    else:
        cost += (wl - pc + 1) * q[qc]
        qc += 1

print cost