first of all (must read)

there was a time when people expressed their love secretly by saying: "i, the sea, and the telephone" - "電話と海と私"

with "tel" stands for "telephone" in short, they created an id code: "iseatel"

iseatel, in japanese is written as:

ア・イ・シ・テ・ル

and it does sound the same "aishiteru" - "愛してる"

which means, i love you.

warning: has historical elements, written in lowercase.