D
C
C
B
NULL
NULL
C
B
C
B
1-2 zile
C
B
D
C
C
B
E
C
C
B
C
B
C
B
C
B
C
B
D
C
NULL
NULL
C
A
C
C
B
C
4-5 zile
C
C
C
B
C
C
C
B