DWITE Contest

Test Case for Question #2 in DWITE 2008-2009 High School Round 4

Contest: DWITE 2008-2009 High School Round 4
Question: #2
Input File: DATA2.txt
Output File: OUT2.txt


Input

XXX
OXO
...
OX.
OOX
OX.
XXO
XOX
OOX
...
...
...
OOX
XXO
OXX




Output

X
O
O
.
.