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2014-10-29T19:01:38+02:00
M=192-163
M=29
N=167-29
N=138
P=192-167
P=25
2014-10-29T19:04:21+02:00
192-167=25asta e p n+25=163 , 163-25=138adica n 192-25-138=29 adica m