七步

One two three four five six seven, one two three four five six seven, one two three, one two three, one two three four five six seven, one two three, one two three, one two three four five six seven. One two three four five six seven, one two three four five six seven, one two three, one two three, one two three four five six seven, one two three, one two three, one two three four five six seven. One two three four five six seven, one two three four five six seven, one two three, one two three, one two three four five six seven, one two three, one two three, one two three four five six seven. One two three four five six seven, one two three four five six seven, one two three, one two three, one two three four five six seven, one two three, one two three, one two three four five six seven.