A--air mail
B--date stamp C--EMS
D--express delivery letter E--letter box
F--please
forward G--post-office box
H--registered letter I--sub-post office
J--telecommunications
service K--regular mail
L--mail order M--mailing list
N--postage
stamp O--post-free
P--postage paid ( )电讯服务 ( )邮政信箱