/*
    Author: Anthony Ngene
    Created: 18/07/2020 - 21:41
*/

import java.io.*;
import java.util.*;

public class Main {
    // Peace begins with a smile. – Mother Teresa
        private static final FastReader in = new FastReader();
        private static final FastWriter out = new FastWriter();
        static ArrayList<Integer>[] adj;

        public static void main(String[] args) throws IOException {
            out.println((char) (in.next().charAt(0) + 1));

            out.close();
        }

        static class FastWriter {
            private static final int IO_BUFFERS = 128 * 1024;
            private final StringBuilder out;

            public FastWriter() {
                out = new StringBuilder(IO_BUFFERS);
            }

            public FastWriter p(Object object) {
                out.append(object);
                return this;
            }

            public FastWriter p(String format, Object... args) {
                out.append(String.format(format, args));
                return this;
            }

            public FastWriter println(Object object) {
                out.append(object).append("\n");
                return this;
            }

            public void close() throws IOException {
                System.out.print(out);
            }
        }

        static class FastReader {
            private static final int IO_BUFFERS = 128 * 1024;
            private DataInputStream din;
            private byte[] buffer;
            private int bufferPointer, bytesRead;

            public FastReader() {
                din = new DataInputStream(System.in);
                buffer = new byte[IO_BUFFERS];
                bufferPointer = bytesRead = 0;
            }

            public FastReader(String file_name) throws IOException {
                din = new DataInputStream(new FileInputStream(file_name));
                buffer = new byte[IO_BUFFERS];
                bufferPointer = bytesRead = 0;
            }

            public String readLine() throws IOException {
                byte[] buf = new byte[64]; // line length
                int cnt = 0, c;
                while ((c = read()) != -1) {
                    if (c == '\n') break;
                    buf[cnt++] = (byte) c;
                }
                return new String(buf, 0, cnt);
            }

            public int intNext() throws IOException {
                int ret = 0;
                byte c = read();
                while (c <= ' ') c = read();
                boolean neg = (c == '-');
                if (neg) c = read();
                do {
                    ret = ret * 10 + c - '0';
                } while ((c = read()) >= '0' && c <= '9');

                if (neg) return -ret;
                return ret;
            }

            public String next() throws IOException {
                byte c = read();
                while (c <= ' ') c = read();
                StringBuilder rs = new StringBuilder();
                do {
                    rs.append((char) c);
                    c = read();
                } while (c > ' ');
                return rs.toString();
            }

            public String line() throws IOException {
                byte c = read();
                StringBuilder rs = new StringBuilder();
                do {
                    rs.append((char) c);
                    c = read();
                } while (c != '\n');
                return rs.toString();
            }

            public long longNext() throws IOException {
                long ret = 0;
                byte c = read();
                while (c <= ' ') c = read();
                boolean neg = (c == '-');
                if (neg) c = read();
                do {
                    ret = ret * 10 + c - '0';
                } while ((c = read()) >= '0' && c <= '9');
                if (neg) return -ret;
                return ret;
            }

            public double doubleNext() throws IOException {
                double ret = 0, div = 1;
                byte c = read();
                while (c <= ' ') c = read();
                boolean neg = (c == '-');
                if (neg) c = read();

                do {
                    ret = ret * 10 + c - '0';
                } while ((c = read()) >= '0' && c <= '9');

                if (c == '.') {
                    while ((c = read()) >= '0' && c <= '9') {
                        ret += (c - '0') / (div *= 10);
                    }
                }

                if (neg) return -ret;
                return ret;
            }

            public int[] nextIntArray(final int n) throws IOException {
                final int[] a = new int[n];
                for (int i = 0; i < n; i++)
                    a[i] = intNext();
                return a;
            }

            public long[] nextLongArray(final int n) throws IOException {
                final long[] a = new long[n];
                for (int i = 0; i < n; i++)
                    a[i] = longNext();
                return a;
            }

            public ArrayList<Integer>[] adjacencyList(int n, int m) throws IOException {
                ArrayList<Integer>[] adj = new ArrayList[n + 1];
                for (int i = 1; i <= n; i++) adj[i] = new ArrayList<>();
                for (int i = 0; i < m; i++) {
                    int a = intNext(), b = intNext();
                    adj[a].add(b);
                    adj[b].add(a);
                }
                return adj;
            }

            private void fillBuffer() throws IOException {
                bytesRead = din.read(buffer, bufferPointer = 0, IO_BUFFERS);
                if (bytesRead == -1) buffer[0] = -1;
            }

            private byte read() throws IOException {
                if (bufferPointer == bytesRead) fillBuffer();
                return buffer[bufferPointer++];
            }

            public void close() throws IOException {
                if (din == null) return;
                din.close();
            }
        }

        static class util {
            public static int upperBound(long[] array, long obj) {
                int l = 0, r = array.length - 1;
                while (r - l >= 0) {
                    int c = (l + r) / 2;
                    if (obj < array[c]) {
                        r = c - 1;
                    } else {
                        l = c + 1;
                    }
                }
                return l;
            }

            public static int upperBound(ArrayList<Long> array, long obj) {
                int l = 0, r = array.size() - 1;
                while (r - l >= 0) {
                    int c = (l + r) / 2;
                    if (obj < array.get(c)) {
                        r = c - 1;
                    } else {
                        l = c + 1;
                    }
                }
                return l;
            }

            public static int lowerBound(long[] array, long obj) {
                int l = 0, r = array.length - 1;
                while (r - l >= 0) {
                    int c = (l + r) / 2;
                    if (obj <= array[c]) {
                        r = c - 1;
                    } else {
                        l = c + 1;
                    }
                }
                return l;
            }

            public static int lowerBound(ArrayList<Long> array, long obj) {
                int l = 0, r = array.size() - 1;
                while (r - l >= 0) {
                    int c = (l + r) / 2;
                    if (obj <= array.get(c)) {
                        r = c - 1;
                    } else {
                        l = c + 1;
                    }
                }
                return l;
            }

            public static void print(long[] arr) {
                System.out.println(Arrays.toString(arr));
            }

            public static void print(int[] arr) {
                System.out.println(Arrays.toString(arr));
            }

            public static void print(char[] arr) {
                System.out.println(Arrays.toString(arr));
            }

            static <T> T[][] deepCopy(T[][] matrix) {
                return Arrays.stream(matrix).map(el -> el.clone()).toArray($ -> matrix.clone());
            }

            static int[][] deepCopy(int[][] matrix) {
                return Arrays.stream(matrix).map(int[]::clone).toArray($ -> matrix.clone());
            }
        }

        static class Tuple implements Comparable<Tuple> {
            int a;
            int b;

            public Tuple(int a, int b) {
                this.a = a;
                this.b = b;
            }

            public int getA() {
                return a;
            }

            public int getB() {
                return b;
            }

            public int compareTo(Tuple other) {
                if (this.a == other.a) return Integer.compare(this.b, other.b);
                return Integer.compare(this.a, other.a);
            }

            @Override
            public int hashCode() {
                return Arrays.deepHashCode(new Integer[]{a, b});
            }

            @Override
            public boolean equals(Object o) {
                if (!(o instanceof Tuple)) return false;
                Tuple pairo = (Tuple) o;
                return (this.a == pairo.a && this.b == pairo.b);
            }

            @Override
            public String toString() {
                return String.format("%d,%d  ", this.a, this.b);
            }
        }
}


Measured memory_bytes: 32768