Răspuns:
a) 12345,23456,34567,45678,56789
b)11111,22222,33333,44444,55555,66666,
77777,88888,99999
c) 22222,44444,66666,88888,22224,22244,
22444,24444,24680,26408,28046
sper ca te-am ajutat :)