import sys line_no, count, a, x = 0, 0, [], '' for line in sys.stdin: if line_no == 0: a = line.split() elif line_no == 1: x = line.strip() else: break line_no += 1 for i in a: for j in i: if x.isalpha(): if j.isalpha() and j.upper() == x.upper(): count += 1 else: if j.isdigit() and int(j) == int(x)...