A golf ball position marking assembly that includes a marker removably secured to a decorative or functional accessory item such as a ring, pendant, clip, belt, key ring, bracelet, buckle, divot tool, or the like. The exercise device includes a frame, a pair of supporting members that have a first end to rotate about an axis and a second end to move along a reciprocating path, a pair of pedals joined to the supporting members, and a guider assembly for adjusting an incline angle of the reciprocating path. A second structure stores frequently occurring characters that are subsequent to the frequently occurring characters stored in the first structure, and a probability of occurrence of each frequently occurring subsequent character.