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...................... " " :8" " :49" "
.............. .................. " " : - - - " " :
( ) : .....
: .........
: + -
..............
" "
1- :
( ) ( ) ....... : = = = = =
2- :
> < : 3- :
: ( )
4- :
: ......... ( ) - - ( ) - - - - - ( ) - - ( ) -- --