1s/"\([^"]*\)"/���\1���/g 2s/`\([^`']*\)'/���\1���/g 3s/ '\([^`']*\)' / ���\1��� /g 4s/ '\([^`']*\)'$/ ���\1���/g 5s/^'\([^`']*\)' /���\1��� /g 6s/������/""/g 7