drop c

|--------------------------------|
|--------------------------------|
|----------------7-5-----7-5-----|
|----5----8-7-5------7-8-----7-8-|       X 2
|--5---5-------------------------|
|-5------------------------------|

|----------------------------------------------------------------|
|----------------------------------------------------------------|
|------------3-2-|slide|--3-2-3------------3-2-|slide|-3-5-2-2-2-|
|------1---------|3-4-5|--------------1--------|3-4-5|-----------|
|---1----1--------------------------1---1------------------------|
|-1-------------------------------1------------------------------|