2_3.cpp

#include <stdio.h>


int main() {
    char ch;
    printf("Enter the first letter:\n");
    scanf(" %c", &ch);

    switch (ch) {
        case 'A':
        case 'a':
            printf("5 Asian countries: China, Japan, India, Thailand, Vietnam\n");
            break;
        case 'R':
        case 'r':
            printf("6 rivers: Nile, Amazon, Yangtze, Mississippi, Danube, Volga\n");
            break;
        case 'C':
        case 'c':
            printf("7 European capitals: London, Paris, Berlin, Rome, Madrid, Vienna, Prague\n");
            break;
        case 'F':
        case 'f':
            printf("5 flowers: Rose, Tulip, Lily, Daisy, Orchid\n");
            break;
        case 'T':
        case 't':
            printf("6 trees: Oak, Pine, Maple, Birch, Willow, Spruce\n");
            break;
        default:
            printf("Error: No list for this letter.\n");
    }
    return 0;
}