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#include <unistd.h> void ft_putchar(char c) { write(1, &c, 1); } int main(void) { char ch = 'a'; while (ch <= 'z') { if (ch % 2 == 0) ft_putchar(ch - 'a' + 'A'); else ft_putchar(ch); ch++; } ft_putchar('\n'); return 0; }