Letters that make periodic breathing
a, o, b, d, e, g, n, p, c, h, r, t, i are letters that make 'periodic breathing'
Words within periodic breathing
ER, OD, hi, pe, period, re, BR, IC, hin, at, ng, RI, Ea, breathing, thin, periodic, ic, in, thing, breath, Rio, HI, IN, Io, Re, peri, At, Br, Er, In, Th, eat are words within 'periodic breathing'