Răspuns :
Răspuns:
198 199 200
__ ___
299 300 301
___ ___
640 641 642
___ ___
519 520 521
___ ___
989 990 991
___ ___
99 100 101
__ __
479 480 481
___ ___
509 510 511
___ ___
vecinul mai mic- predecesor
vecinul mai mare- succesor
198,199,200
299,300,301
640,641,642
519,520,521
989,990,991
99,100,101
479,480,481
509,510,511
299,300,301
640,641,642
519,520,521
989,990,991
99,100,101
479,480,481
509,510,511