[START]
-opt-
:per
30
-optend-
:addcarry
1
  
100
5
8
10
[END]
[START]
-opt-
:per
30
-optend-
:addcarry
1
  
110
6
9
10
[END]
[START]
-opt-
:per
30
-optend-
:addcarry
1
ũ  
100
5
8
10
[END]
[START]
-opt-
:per
30
-optend-
:addcarry
1
ũ ǰ 
110
6
9
10
[END]
[START]
-opt-
:per
30
-optend-
:addcarry
1
̽  
100
5
8
10
[END]