N

Size: a a a
N
СС
YG
S
ch
n.
СС
SS
SS
GV
..
GV
int number = 7;
String result = Stream.iterate(1, n -> n + 1)
.flatMap(num -> Stream.generate(() -> num).limit(num))
.limit(number)
.map(String::valueOf)
.collect(Collectors.joining(" "));
Output: 1 2 2 3 3 3 4
M
S
DC
DK
S
DC