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function flipFn(fn) {  return (...input) => {    if (input.length === 1) {      return holder => fn(holder, input[0])    } else if (input.length === 2) {      return fn(input[1], input[0])    } else if (input.length === 3) {      return fn(input[1], input[0], input[2])    } else if (input.length === 4) {      return fn(input[1], input[0], input[2], input[3])    }
    throw new Error("R.flip doesn't work with arity > 4")  }}
export function flip(fn) {  return flipFn(fn)}