Răspuns:
De șase numere :071234,072134,072345,076789,0722117,075669,073321,076543,078965,074321,076458,073497,079999,072225,078906,079320,075690,076107,079731,071452,074261,079931,073672,079377,079720,073421,072121,075699,074351
Explicație pas cu pas:
De fapt sunt infinite.
