"字符1减字符0"...字符1减字符0
"字符6减字符0"...字符6减字符0
"字符数字减字符0"...字符数字减字符0
"字符2减字符0"...字符2减字符0
"字符减32"...字符减32
"字符减数字"...字符减数字
"字符2减字符1"...字符2减字符1
"字符减48"...字符减48
"字符0到9"...字符0到9
"字符减去'0'"...字符减去'0'
