class String

# File lib/mmistring.rb, line 6
def cut(c)
  i = index c
  i ? slice(i+1, length-1) : self
end

# File lib/mmistring.rb, line 11
def cut!(c)
  replace cut(c)
end

# File lib/mmistring.rb, line 16
def rcut(c)
  i = rindex c
  i ? slice(0, i) : self
end

# File lib/mmistring.rb, line 21
def rcut!(c)
  replace rcut(c)
end