sentences:  Both male and female senior single skaters must perform seven elements in their short program.They both must include a double or triple axel; one triple jump; a jump combination consisting of either a double jump and a triple jump, or two triple jumps; a spin combination with just one change of foot; and a step sequence using the entire ice surface.Additionally, men may substitute the one triple jump for a quadruple jump; have a quadruple jump as part of their jump combination; and must also have a camel spin or sit spin with just one change of foot.