a) 1.996 – 1.997 – – – –
b) 2.097 – 2.098 – – – –
c) 3.498 – 3.499 – – – –
d) 4.998 – 4.999 – – – –
e) 6.797 – 6.798 – – – –
f) 8.996 – 8.997 – – – –