Letters that make single-spacing
s, a, e, g, l, n, p, c, i are letters that make 'single-spacing'
Words within single-spacing
spa, PA, spacing, si, PAC, AC, Ci, Pa, ng, SI, single, ci, in, sin, IN, Sin, pa, LE, Ac, In, Si, pacing, sing are words within 'single-spacing'