AUM And ALM

"The Maulvi made me listen to a most entertaining sermon on religion. That Hinduism and Islam have the same basic principles: in the Omkara of the Hindus we have the three syllables, A, U, M; the first three letters of the Holy Koran are A, L, M. According to philological laws, U is used for L; ergo, Hindus and Musulmans have the same mantra or sacred syllables."
(excerpt from Sri Aurobindo's prison life")