Letters that make backspace character
s, a, b, e, k, p, c, h, r, t are letters that make 'backspace character'
Words within backspace character
ER, spa, character, PA, act, BA, te, ACE, PAC, Ba, AC, ar, Pa, HA, Ara, ace, CE, back, space, pace, CT, Chara, char, backspace, RA, AR, KS, Ra, pa, Ac, Ar, Ce, Er, Te are words within 'backspace character'