Align self

Default values

Classname key	CSS value
a	`auto`
n	`normal`
c	`center`
s	`start`
e	`end`
ss	`self-start`
se	`self-end`
fs	`flex-start`
fe	`flex-end`
b	`baseline`
fb	`first baseline`
lb	`last baseline`
str	`stretch`
sc	`safe center`
usc	`unsafe center`