import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; public class P2292_5 { static InputStream is; static PrintWriter out; static String INPUT = ""; static void solve() { String s = ns(); String t = ns(); int n = s.length(), m = t.length(); nn = n; Node[] nodes = build((s+"${" + t).toCharArray()); long ret = 0; for(int i = 2;i < nodeslen;i++){ ret += (long)nodes[i].freq0 * nodes[i].freq1; } out.println(ret); } static int nn; static int nodeslen; public Node[] nodes; // [0]=len0, [1]=hell public static class Node { public int len, freq0, freq1; public char c; public Node firstChild; public Node sibling; public Node link; private Node(int len, char c) { this.len = len; this.c = c; this.freq0 = this.freq1 = 0; } public Node next(char x) { for(Node ch = this.firstChild;ch != null;ch = ch.sibling){ if(ch.c == x)return ch; } return null; } public void add(Node x) { Node ch = this.firstChild; this.firstChild = x; x.sibling = ch; } // @Override // public String toString() { // return "Node [id=" + id + ", first=" + first + ", len=" + len + ", freq=" + freq + ", c=" + c // + ", firstChild=" + (firstChild != null ? firstChild.id : null) + ", sibling=" + (sibling != null ? sibling.id : null) // + ", link=" + (link != null ? link.id : null) + "]"; // } } public static Node[] build(char[] s) { int n = s.length; Node zero = new Node(0, (char)0); Node hell = new Node(-1, (char)0); zero.link = hell; hell.link = hell; hell.add(zero); Node[] nodes = new Node[n+2]; int p = 0; nodes[p++] = hell; nodes[p++] = zero; Node cur = zero; // current suffix palindrome for(int i = 0;i < n;i++){ char x = s[i]; while(i-cur.len-1 < 0 || s[i-cur.len-1] != x)cur = cur.link; // find xAx Node xax = cur.next(x); // already exists if(xax == null){ // new subpalindrome xax = new Node(cur.len+2, x); nodes[p++] = xax; cur.add(xax); // make suffix link if(xax.len == 1){ xax.link = zero; }else{ Node b = cur.link; while(true){ while(i-b.len-1 < 0 || s[i-b.len-1] != x)b = b.link; // find xBx Node xbx = b.next(x); if(xbx != null){ xax.link = xbx; break; } } } } // tr(i, nn, i-cur.len-1, nn); if(i < nn){ xax.freq0++; }else if(i-xax.len+1 >= nn+2){ xax.freq1++; } cur = xax; } for(int i = p-1;i >= 2;i--){ nodes[i].link.freq0 += nodes[i].freq0; nodes[i].link.freq1 += nodes[i].freq1; } nodeslen = p; return nodes; } public static void main(String[] args) throws Exception { // int n = 500000, m = 99999; // Random gen = new Random(); // StringBuilder sb = new StringBuilder(); // for (int i = 0; i < n; i++) { //// sb.append("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); //// sb.append("ZYXWVUTSRQPONMLKJIHGFEDCBA"); // sb.append((char)(gen.nextInt(1)+'A')); // } //// for (int i = 0; i < n/52; i++) { //// sb.append("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); //// sb.append("ZYXWVUTSRQPONMLKJIHGFEDCBA"); ////// sb.append((char)(gen.nextInt(1)+'A')); //// } // sb.append("\n"); // for (int i = 0; i < n; i++) { //// sb.append("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); //// sb.append("ZYXWVUTSRQPONMLKJIHGFEDCBA"); // sb.append((char)(gen.nextInt(1)+'A')); // } // PrintWriter inp = new PrintWriter("c:\\temp\\in2.in"); // inp.println(sb); // inp.close(); // // INPUT = sb.toString(); long S = System.currentTimeMillis(); is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes()); out = new PrintWriter(System.out); solve(); out.flush(); long G = System.currentTimeMillis(); tr(G-S+"ms"); } private static boolean eof() { if(lenbuf == -1)return true; int lptr = ptrbuf; while(lptr < lenbuf)if(!isSpaceChar(inbuf[lptr++]))return false; try { is.mark(1000); while(true){ int b = is.read(); if(b == -1){ is.reset(); return true; }else if(!isSpaceChar(b)){ is.reset(); return false; } } } catch (IOException e) { return true; } } private static byte[] inbuf = new byte[1024]; static int lenbuf = 0, ptrbuf = 0; private static int readByte() { if(lenbuf == -1)throw new InputMismatchException(); if(ptrbuf >= lenbuf){ ptrbuf = 0; try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); } if(lenbuf <= 0)return -1; } return inbuf[ptrbuf++]; } private static boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private static int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; } private static double nd() { return Double.parseDouble(ns()); } private static char nc() { return (char)skip(); } private static String ns() { int b = skip(); StringBuilder sb = new StringBuilder(); while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ') sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } private static char[] ns(int n) { char[] buf = new char[n]; int b = skip(), p = 0; while(p < n && !(isSpaceChar(b))){ buf[p++] = (char)b; b = readByte(); } return n == p ? buf : Arrays.copyOf(buf, p); } private static char[][] nm(int n, int m) { char[][] map = new char[n][]; for(int i = 0;i < n;i++)map[i] = ns(m); return map; } private static int[] na(int n) { int[] a = new int[n]; for(int i = 0;i < n;i++)a[i] = ni(); return a; } private static int ni() { int num = 0, b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private static long nl() { long num = 0; int b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); } }