lefts = {}
rights = {}

for line in open("ita2.txt", "rb"):
    left, right, letter, figure = line.strip().split()
    
    if letter == "_":
        letter = " "
    lefts[left] = (letter, figure)
    rights[right] = (letter, figure)

data = "1-1 1-1 1-1 1-1 1-1 1-1 1-1 3-1 5-1 6-1 2-1 1-2 2-2 1-1 1-3 1-1 2-5 2-5 5-6 3-1 5-1 6-3 2-2 2-1 2-1 5-1 7-2 1-4 2-2 1-1 2-5 2-5 5-6"
data+=" 3-1 5-1 8-2 3-5 3-4 1-1 1-1 1-1 2-1 1-5 1-2 1-1 3-1 5-1 6-1 1-2 3-3 2-2 3-1 5-1 2-1 2-1 1-1 1-1"
data+=" 2-2 3-1 3-2 2-2 1-1 1-1 3-1 7-1 1-6 1-2 2-1 2-1 1-1 1-1 1-2 1-4 2-1"
data+=" 5-1 2-1 4-6 6-1 7-2 2-4 1-2 2-1 2-1 1-1 1-1 1-2 1-4 2-1 5-1 1-1 1-1 1-1 2-3 3-1 6-4 2-4 1-1 1-3 2-4 2-2 3-3 2-1 1-4 1-1 1-1 3-1 5-1 6-3 2-2 1-1 1-2"
data+=" 2-4 2-1 2-2 2-1 5-1 6-1 3-1 2-3 2-2 3-1 5-1 6-1 1-1 3-1 2-1 2-1 5-1 6-3 2-2 1-1 1-2"
data+=" 1-1 1-2 2-1 2-1 1-2 2-3 1-2 1-3 3-8 3-1 5-1 2-1 4-1 2-1 1-1 2-5 2-1 4-1 6-1 7-1 2-4 2-2 1-1 1-2 1-1 2-1 2-1 2-4"
data+=" 1-1 1-1 1-4 2-1 5-1 6-1 1-1 3-1 2-1 2-1 5-1 6-4 4-6 1-1 1-1 1-1 2-1 1-4 4-1 1-5 1-1 2-2 1-4 2-1 5-1 1-1 1-1 1-3"
data+=" 2-2 1-1 1-1 1-1 2-1 1-1 2-1 1-1 3-4 4-1 6-4 4-6 1-1 1-1 1-1 2-1 1-2 3-1 2-4 1-2 1-4 3-1 5-1 1-1 1-1 1-3"
data+=" 2-2 1-1 1-1 1-2 3-1 2-1 3-1 6-1 2-2 2-3 1-8 1-2 1-1 3-1 5-1 6-1 1-1 1-5 1-1 3-5 1-1 2-2 1-4 1-1 2-3 2-2 3-1 1-6"
data+=" 3-1 1-1 1-5 1-1 1-1 1-5 2-1 3-2 3-2 2-2 1-1 1-5 1-1 1-2 3-4 2-1 1-1 2-6 2-2 2-3 2-2 1-1 1-2 1-1 1-2 6-6"
data+=" 1-1 1-2 1-2 2-2 1-2 1-4 1-1 2-4 2-1 1-4 1-1 1-1 3-1 5-1 6-1 2-2 2-3 1-8 1-2 1-1 3-1 5-1 6-2 4-1 2-1 1-2 1-1 2-6"
data+=" 2-1 1-2 2-4 2-3 2-1 3-1 4-1 1-1 2-2 2-1 1-1 1-1 1-1 6-1 1-1"

s = ""
for foo in data.split():
    a, b = foo.split("-")
    
    s += "1" * int(a)
    s += "0" * int(b)
    
for offset in xrange(1):     
    shift = 0

    ss = ""
    for i in range(offset, len(s)-5, 5):
        c = lefts[s[i:i+5]][shift]
        
        if c == "[s2f]":
            shift = 1
        elif c == "[s2l]":
            shift = 0
        else:
            ss += c
        
        
    print ss


-------------------------------------------------- ita2.txt

00000 00000 null null
00100 00100 _ space
10111 11101 Q 1
10011 11001 W 2
00001 10000 E 3
01010 01010 R 4
10000 00001 T 5
10101 10101 Y 6
00111 11100 U 7
00110 01100 I 8
11000 00011 O 9
10110 01101 P 0
00011 11000 A –
00101 10100 S [BELL]
01001 10010 D $
01101 10110 F !
11010 01011 G &
10100 00101 H #
01011 11010 J '
01111 11110 K (
10010 01001 L )
10001 10001 Z "
11101 10111 X /
01110 01110 C :
11110 01111 V ;
11001 10011 B ?
01100 00110 N ,
11100 00111 M .
01000 00010 [CR] [CR]
00010 01000 [LF] [LF]
11011 11011 [s2f] [???]
11111 11111 [???] [s2l]