START 1 2
1A


A
END
START 1 5
1F
2A 2B 3CD 3E




B
C D
F
A E
END
START 1 10
9I
2A
3B
4C
5D
6E
7F
8G
9H


A
B
C
D
E
F
G
H
X
END
START 1 10
9I 1X
2A
3B
4C
5D
6E
7F
8G
9H


A
B
C
D
E
F
G
H
X I
END
START 0 1


END
START 0 1

ABCDEFGHIJKLMNOPQRSTUVWXYZ
END
START 0 2
1ABCDEFGHIJKLMNOPQRSTUVWXYZ



END
START 1 2
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1



END
START 1 2
1A



END
START 1 2
1ABCDEFGHIJKLMNOPQRSTUVWXYZ


ABCDEFGHIJKLMNOPQRSTUVWXYZ
END
START 13 14
1AB
2CD
3EF
4GH
5IJ
6KL
7MN
8OP
9QR
10ST
11UV
12WX
13YZ


AB
CD
EF
GH
IJ
KL
MN
OP
QR
ST
UV
WX
YZ
END
START 1 3
1ABCDEFGHIJKLMNOPQRSTUVWXYZ
2



ABCDEFGHIJKLMNOPQRSTUVWXYZ
END
START 1 3
1A 2
2




END
START 19 20
19A
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19


A


















END
ENDOFINPUT