 Complete the following phrase:  Charlotte Walter born 8 October 1951 in Aarau is a Swiss former figure skater who competed in ladies singles. She won the gold medal at the Swiss Figure Skating Championships for five straight years, from 1968 to 1972. She finished in the top ten at three ISU Championships  1971 Europeans in Zurich, Switzerland; 1971 Worlds in Lyon, France; and 