swapPos = (str, a, b)=>{
	str = str.split("");
	temp = str[a];
	str[a] = str[b];
	str[b] = temp;
	return str.join("");
};
swapLetter = (str, a, b) => (str.split("").map((char)=>((char == a) ? (b) : ((char == b) ? (a) : (char)))).join(""));
rotate = (str, steps) => (str.split("").map((a, i)=>(str[(i + steps + str.length)%(str.length)])).join("")); //left pos, right neg
reverseRotatePos = (str, char) => (str.split("").map((a, i)=>(str[(i + ((str.indexOf(char)%2 == 0) ? (/*even*/ (((str.indexOf(char) == 0) ? (str.length) : (str.indexOf(char)))/2) + 5) : (/*odd*/ Math.ceil((str.indexOf(char))/2))) + (str.length*2))%(str.length)])).join(""));
reverseBetween = (str, a, b) => (str.split("").map((char, i)=>(((i >= a) && (i <= b)) ? (str[b - (i - a)]) : (char))).join(""));
moveToPos = (str, a, b) => {
	var str = str.split("");
	var char = str.splice(a, 1)[0];
	str.splice(b, 0, char);
	return str.join("");
};

var input = require("fs").readFileSync("input.txt").toString().replace(/\r/g, "");
var instructions = input.split("\n").reverse().filter((a)=>(a)).map((str)=>(
	str
	.replace(/swap position ([0-9]+) with position ([0-9]+)/g, "swapPos(text, $1, $2)")
	.replace(/swap letter (.) with letter (.)/g, "swapLetter(text, \"$1\", \"$2\")")
	.replace(/rotate left ([0-9]+) step(s)?/g, "rotate(text, -$1)")
	.replace(/rotate right ([0-9]+) step(s)?/g, "rotate(text, $1)")
	.replace(/rotate based on position of letter (.)/g, "reverseRotatePos(text, \"$1\")")
	.replace(/reverse positions ([0-9]+) through ([0-9]+)/g, "reverseBetween(text, $1, $2)")
	.replace(/move position ([0-9]+) to position ([0-9]+)/g, "moveToPos(text, $2, $1)")
));

var out = instructions.reduce((text, instruction)=>(eval(instruction)), "fbgdceah")
console.log(out);