Column titles:
[1] - Moscow
[2] - Krasnodar
[3] - Saint-Petersburg
[4] - Ulyanovsk
Date          [1]      [2]      [3]      [4]
21 May          3        1        0        0
22 May          4        0        0        0
23 May          3        0        0        0
24 May          2        0        0        0
25 May          3        0        0        0
26 May          1        0        0        0
27 May          3        1        0        0
28 May          4        1        0        0
29 May          3        1        0        0
30 May          5        1        0        0
31 May          0        1        0        0
1 Jun.          1        1        0        0
2 Jun.          3        0        0        0
3 Jun.          3        1        0        0
4 Jun.          3        1        0        0
5 Jun.          2        0        0        1
6 Jun.          5        0        0        1
7 Jun.          0        0        0        1
8 Jun.          0        0        0        1
9 Jun.          2        0        0        1
10 Jun.         2        0        1        1
11 Jun.         2        1        0        0
12 Jun.         0        1        0        0
13 Jun.         0        0        1        0
14 Jun.         0        1        0        0
15 Jun.         1        1        0        0
16 Jun.         3        1        0        0
17 Jun.         2        1        0        0
18 Jun.         2        1        0        0
19 Jun.         2        1        0        0
20 Jun.         1        1        0        0