As you know, neis is the Hebrew word for miracle, and that's what the letter nun on the dreidel stands for, with gimel for gadol meaning great, hay for haya meaning happened, and shin for sham meaning there. Neis gadol haya sham means a great miracle happened there, but in Israel they say, a great miracle happened here, and instead of the shin, their dreidels have a pei for po, meaning here.
For more on the subject, let's consult the musical group, Six13, singing Chanukah (Shake It Off):
Let us celebrate the miracle of light, and life, tonight, and every night! Happy Hanukah!