#include <stdio.h>
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int main(void) {
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char letter;
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printf("Give an uppercase char: ");
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scanf("%c", &letter);
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if (letter < 'A' || letter > 'Z') {
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printf("ERROR: No uppercase char\n");
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return 1;
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}
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for (char i = 'A'; i <= letter; i++) {
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for (char a = letter - i; a > 0; a--) {
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printf(" ");
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}
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for (char b = 'A'; b <= i ; b++) {
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printf("%c", b);
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}
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for (char c = i - 1; c >= 'A' ; c--) {
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printf("%c", c);
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}
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printf("\n");
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}
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return 0;
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}
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