a@b.com
a@b.org
bcd@efg.abc
a-b.c@d.com
a@b.c
234aa@22ab.ac.in
234aa@ssdf23.ac
ab@b.com
a@b.c
a@b-d.ii-t.a-c.in
a.b-c_d@e-f.g-h.i-3j.4-6.in
