Letters that make grammatical rule
a, e, g, l, c, m, r, t, i, u are letters that make 'grammatical rule'
Words within grammatical rule
rule, RAM, AM, MA, MAT, ti, IC, ma, Gram, gramma, tical, at, mA, gram, mm, mat, grammatical, ic, grammatic, ram, RA, AL, CA, Ra, Ram, LE, tic, Al, Am, At, Ca, Ru, Ti are words within 'grammatical rule'